diff --git a/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudPlayerQuitEvent.java b/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudPlayerQuitEvent.java
index 4d7cac2b..26135a4e 100644
--- a/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudPlayerQuitEvent.java
+++ b/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudPlayerQuitEvent.java
@@ -8,7 +8,7 @@
 import org.jetbrains.annotations.NotNull;
 
 /**
- * HudPlayer quit event.
+ * player quit event.
  */
 @Getter
 public class HudPlayerQuitEvent extends PlayerEvent implements BetterHudEvent {
diff --git a/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudUpdateEvent.java b/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudUpdateEvent.java
index a3adfd7d..5fd8f9ed 100644
--- a/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudUpdateEvent.java
+++ b/api/bukkit-api/src/main/java/kr/toxicity/hud/api/bukkit/event/HudUpdateEvent.java
@@ -8,7 +8,7 @@
 import org.jetbrains.annotations.NotNull;
 
 /**
- * HudPlayer update event.
+ * player update event.
  */
 @Getter
 public class HudUpdateEvent extends PlayerEvent implements BetterHudEvent {
diff --git a/api/standard-api/src/main/java/kr/toxicity/hud/api/popup/Popup.java b/api/standard-api/src/main/java/kr/toxicity/hud/api/popup/Popup.java
index c0ecadcf..68ec4183 100644
--- a/api/standard-api/src/main/java/kr/toxicity/hud/api/popup/Popup.java
+++ b/api/standard-api/src/main/java/kr/toxicity/hud/api/popup/Popup.java
@@ -32,12 +32,12 @@ public interface Popup extends HudObject {
     @Nullable PopupUpdater show(@NotNull UpdateEvent reason, @NotNull HudPlayer player);
 
     /**
-     * Hides popup to some hudPlayer.
-     * @param hudPlayer target HudPlayer
+     * Hides popup to some player.
+     * @param player target player
      * @return whether to success
      */
-    default boolean hide(@NotNull HudPlayer hudPlayer) {
-        var group = hudPlayer.getPopupGroupIteratorMap().remove(getGroupName());
+    default boolean hide(@NotNull HudPlayer player) {
+        var group = player.getPopupGroupIteratorMap().remove(getGroupName());
         if (group != null) {
             group.clear();
             return true;
@@ -46,7 +46,7 @@ default boolean hide(@NotNull HudPlayer hudPlayer) {
 
     /**
      * Gets a last index of popup.
-     * It equals getMaxStackSize() - 1
+     * It equals getMaxStack() - 1
      * @return last index
      */
     default int getLastIndex() {
diff --git a/bootstrap/bukkit/build.gradle.kts b/bootstrap/bukkit/build.gradle.kts
index 41dd7ab7..ff407113 100644
--- a/bootstrap/bukkit/build.gradle.kts
+++ b/bootstrap/bukkit/build.gradle.kts
@@ -18,10 +18,10 @@ dependencies {
     compileOnly("com.sk89q.worldedit:worldedit-bukkit:7.4.0-SNAPSHOT")
     compileOnly("com.sk89q.worldguard:worldguard-bukkit:7.1.0-SNAPSHOT")
     compileOnly("com.github.MilkBowl:VaultAPI:1.7.1")
-    compileOnly("com.github.SkriptLang:Skript:2.9.4")
+    compileOnly("com.github.SkriptLang:Skript:2.9.5")
     compileOnly("net.skinsrestorer:skinsrestorer-api:15.4.4")
     compileOnly("com.alessiodp.parties:parties-bukkit:3.2.16")
-    compileOnly("com.nexomc:nexo:0.1.0-dev.62")
+    compileOnly("com.nexomc:nexo:0.1.0-dev.73")
     compileOnly("io.th0rgal:oraxen:1.185.0")
 }
 
diff --git a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/BukkitBootstrapImpl.kt b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/BukkitBootstrapImpl.kt
index 4857d922..f9b85465 100644
--- a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/BukkitBootstrapImpl.kt
+++ b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/BukkitBootstrapImpl.kt
@@ -202,12 +202,12 @@ class BukkitBootstrapImpl : BukkitBootstrap, JavaPlugin() {
         if (pluginManager.isPluginEnabled("GPS")) PlayerManagerImpl.addLocationProvider(GPSLocationProvider())
         pluginManager.registerEvents(object : Listener {
             @EventHandler(priority = EventPriority.HIGHEST)
-            fun join(e: PlayerJoinEvent) {
-                register(e.player)
+            fun PlayerJoinEvent.join() {
+                register(player)
             }
             @EventHandler
-            fun quit(e: PlayerQuitEvent) {
-                val player = e.player
+            fun PlayerQuitEvent.quit() {
+                val player = player
                 PlayerManagerImpl.removeHudPlayer(player.uniqueId)?.let {
                     it.cancel()
                     HudPlayerQuitEvent(it).call()
@@ -255,8 +255,8 @@ class BukkitBootstrapImpl : BukkitBootstrap, JavaPlugin() {
                     warn("Download: https://www.spigotmc.org/resources/115559")
                     Bukkit.getPluginManager().registerEvents(object : Listener {
                         @EventHandler
-                        fun join(e: PlayerJoinEvent) {
-                            val player = e.player
+                        fun PlayerJoinEvent.join() {
+                            val player = player
                             if (player.isOp && ConfigManagerImpl.versionCheck) {
                                 val audience = audiences.player(player)
                                 audience.info("New BetterHud version found: $body")
diff --git a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/nexo/NexoCompatibility.kt b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/nexo/NexoCompatibility.kt
index a5f6de8a..2c07865b 100644
--- a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/nexo/NexoCompatibility.kt
+++ b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/nexo/NexoCompatibility.kt
@@ -34,11 +34,11 @@ class NexoCompatibility : Compatibility {
         (BOOTSTRAP as BukkitBootstrapImpl).skipInitialReload = true
         registerListener(object : Listener {
             @EventHandler
-            fun generate(event: NexoPrePackGenerateEvent) {
+            fun NexoPrePackGenerateEvent.generate() {
                 when (val state = PLUGIN.reload()) {
                     is Success -> {
                         state.resourcePack.forEach {
-                            event.addUnknownFile(it.key, it.value)
+                            addUnknownFile(it.key, it.value)
                         }
                         info("Successfully merged with Nexo: (${state.time} ms)")
                     }
diff --git a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/oraxen/OraxenCompatibility.kt b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/oraxen/OraxenCompatibility.kt
index 8eb15762..2139e94e 100644
--- a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/oraxen/OraxenCompatibility.kt
+++ b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/compatibility/oraxen/OraxenCompatibility.kt
@@ -2,7 +2,6 @@ package kr.toxicity.hud.bootstrap.bukkit.compatibility.oraxen
 
 import io.th0rgal.oraxen.api.events.OraxenPackGeneratedEvent
 import io.th0rgal.oraxen.utils.VirtualFile
-import kr.toxicity.hud.api.BetterHudAPI
 import kr.toxicity.hud.api.listener.HudListener
 import kr.toxicity.hud.api.placeholder.HudPlaceholder
 import kr.toxicity.hud.api.plugin.ReloadState.*
@@ -35,10 +34,10 @@ class OraxenCompatibility : Compatibility {
     override fun start() {
         registerListener(object : Listener {
             @EventHandler
-            fun generate(event: OraxenPackGeneratedEvent) {
+            fun OraxenPackGeneratedEvent.generate() {
                 when (val state = PLUGIN.reload()) {
                     is Success -> {
-                        val output = event.output
+                        val output = output
                         state.resourcePack.forEach {
                             output.add(
                                 VirtualFile(
diff --git a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/module/bukkit/BukkitItemModule.kt b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/module/bukkit/BukkitItemModule.kt
index 645eb103..640b6af7 100644
--- a/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/module/bukkit/BukkitItemModule.kt
+++ b/bootstrap/bukkit/src/main/kotlin/kr/toxicity/hud/bootstrap/bukkit/module/bukkit/BukkitItemModule.kt
@@ -23,16 +23,16 @@ class BukkitItemModule : BukkitModule {
     override fun start() {
         registerListener(object : Listener {
             @EventHandler
-            fun drop(e: PlayerDropItemEvent) {
-                UpdateItemEvent(e.player, e.itemDrop.itemStack, e).call()
+            fun PlayerDropItemEvent.drop() {
+                UpdateItemEvent(player, itemDrop.itemStack, this).call()
             }
             @EventHandler
-            fun pickup(e: EntityPickupItemEvent) {
-                val entity = e.entity
+            fun EntityPickupItemEvent.pickup() {
+                val entity = entity
                 if (entity is Player) UpdateItemEvent(
                     entity,
-                    e.item.itemStack,
-                    e
+                    item.itemStack,
+                    this
                 ).call()
             }
         })
diff --git a/changelog/1.10.md b/changelog/1.10.md
index e3c7cddb..a4c6f901 100644
--- a/changelog/1.10.md
+++ b/changelog/1.10.md
@@ -91,6 +91,28 @@ test_head:
         y: 3.0
         static-scale: true
 ```
+- Add 'placeholder-option' and 'placeholder-string-format'
+```yaml
+test_text:
+  texts:
+    1:
+      name: unifont
+      pattern: |
+        [name]
+        [health_percentage]%
+      placeholder-option:
+        evaluate: t * 100
+        join: " "
+      placeholder-string-format:
+        number: "#,###"
+      background: test
+      align: center
+      line-align: center
+      scale: 0.5
+      line: 5
+      split-width: 300
+      y: 32
+```
 - Add these option in config.yml
 ```yaml
 disable-legacy-offset: false #If this is true, a correct pixel offset is provided.
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/compass/type/CircleCompass.kt b/dist/src/main/kotlin/kr/toxicity/hud/compass/type/CircleCompass.kt
index ccaf2b93..a5cd5418 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/compass/type/CircleCompass.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/compass/type/CircleCompass.kt
@@ -13,6 +13,7 @@ import kr.toxicity.hud.manager.ConfigManagerImpl
 import kr.toxicity.hud.pack.PackGenerator
 import kr.toxicity.hud.resource.GlobalResource
 import kr.toxicity.hud.location.GuiLocation
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.shader.HudShader
 import kr.toxicity.hud.shader.RenderScale
 import kr.toxicity.hud.shader.ShaderProperty
@@ -30,7 +31,7 @@ class CircleCompass(
     override val path: String,
     private val internalName: String,
     section: YamlObject
-) : CompassImpl {
+) : CompassImpl, PlaceholderSource by PlaceholderSource.Impl(section) {
     companion object {
         private val defaultColorEquation = TEquation("255").run {
             ColorEquation(
@@ -68,7 +69,7 @@ class CircleCompass(
     )
     private var array: JsonArray? = JsonArray()
     private val images = CompassImage(assets, section["file"]?.asObject().ifNull("file value not set."))
-    private val conditions = section.toConditions() build UpdateEvent.EMPTY
+    private val conditions = section.toConditions(this) build UpdateEvent.EMPTY
     private val isDefault = ConfigManagerImpl.defaultCompass.contains(internalName) || section.getAsBoolean("default", false)
 
 
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/element/ImageElement.kt b/dist/src/main/kotlin/kr/toxicity/hud/element/ImageElement.kt
index 24ee6c7b..ca484d52 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/element/ImageElement.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/element/ImageElement.kt
@@ -10,6 +10,7 @@ import kr.toxicity.hud.manager.ListenerManagerImpl
 import kr.toxicity.hud.manager.PlaceholderManagerImpl
 import kr.toxicity.hud.placeholder.Conditions
 import kr.toxicity.hud.placeholder.ConditionSource
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.util.ifNull
 
 class ImageElement(
@@ -18,7 +19,7 @@ class ImageElement(
     val image: List<NamedLoadedImage>,
     val type: ImageType,
     setting: YamlObject
-) : HudElement, ConditionSource by ConditionSource.Impl(setting) {
+) : HudElement, ConditionSource by ConditionSource.Impl(setting), PlaceholderSource by PlaceholderSource.Impl(setting) {
     val listener = setting["listener"]?.asObject()?.let {
         ListenerManagerImpl.getListener(it)
     }
@@ -48,11 +49,11 @@ class ImageElement(
     }
 
     val follow = setting["follow"]?.asString()?.let {
-        PlaceholderManagerImpl.find(it).apply {
+        PlaceholderManagerImpl.find(it, this).apply {
             if (!java.lang.String::class.java.isAssignableFrom(clazz)) throw RuntimeException("This placeholder is not a string in image $name: $it")
         }
     }
     val childrenMapper = setting["children-mapper"]?.asObject()?.map {
-        it.key to Conditions.parse(it.value.asObject())
+        it.key to Conditions.parse(it.value.asObject(), this)
     }
 }
\ No newline at end of file
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/hud/HudImpl.kt b/dist/src/main/kotlin/kr/toxicity/hud/hud/HudImpl.kt
index 4c45c82d..3e9f622c 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/hud/HudImpl.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/hud/HudImpl.kt
@@ -14,6 +14,7 @@ import kr.toxicity.hud.manager.ConfigManagerImpl
 import kr.toxicity.hud.manager.LayoutManager
 import kr.toxicity.hud.pack.PackGenerator
 import kr.toxicity.hud.location.GuiLocation
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.resource.GlobalResource
 import kr.toxicity.hud.util.*
 
@@ -22,7 +23,7 @@ class HudImpl(
     private val internalName: String,
     resource: GlobalResource,
     section: YamlObject
-) : Hud, HudConfiguration {
+) : Hud, HudConfiguration, PlaceholderSource by PlaceholderSource.Impl(section) {
 
     private var imageChar = 0xCE000
 
@@ -37,7 +38,7 @@ class HudImpl(
     var textIndex = 0
 
     fun getOrCreateSpace(int: Int) = spaces.computeIfAbsent(int) {
-        (++imageChar).parseChar()
+        newChar
     }
 
     private val elements = section["layouts"]?.asObject().ifNull("layout configuration not set.").mapSubConfiguration { s, yamlObject ->
@@ -86,7 +87,7 @@ class HudImpl(
         return HudObjectType.HUD
     }
 
-    private val conditions = section.toConditions() build UpdateEvent.EMPTY
+    private val conditions = section.toConditions(this) build UpdateEvent.EMPTY
 
     override fun getComponents(player: HudPlayer): List<WidthComponent> {
         if (!conditions(player)) return emptyList()
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/layout/HudLayout.kt b/dist/src/main/kotlin/kr/toxicity/hud/layout/HudLayout.kt
index afbec07d..a0c013bb 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/layout/HudLayout.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/layout/HudLayout.kt
@@ -4,10 +4,11 @@ import kr.toxicity.hud.api.yaml.YamlObject
 import kr.toxicity.hud.element.HudElement
 import kr.toxicity.hud.location.PixelLocation
 import kr.toxicity.hud.placeholder.ConditionSource
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.shader.RenderScale
 import kr.toxicity.hud.shader.ShaderProperty
 
-interface HudLayout<T : HudElement> : ConditionSource {
+interface HudLayout<T : HudElement> : ConditionSource, PlaceholderSource {
     val source: T
     val outline: Boolean
     val layer: Int
@@ -26,7 +27,7 @@ interface HudLayout<T : HudElement> : ConditionSource {
         group: LayoutGroup,
         originalLoc: PixelLocation,
         yaml: YamlObject
-    ) : HudLayout<T>, ConditionSource by ConditionSource.Impl(source, yaml) + group {
+    ) : HudLayout<T>, ConditionSource by source + ConditionSource.Impl(yaml) + group, PlaceholderSource by PlaceholderSource.Impl(yaml) {
         override val outline: Boolean = yaml.getAsBoolean("outline", false)
         override val layer: Int = yaml.getAsInt("layer", 0)
         override val property: Int = ShaderProperty.properties(yaml["properties"]?.asArray())
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/layout/ImageLayout.kt b/dist/src/main/kotlin/kr/toxicity/hud/layout/ImageLayout.kt
index 85bb6760..15dfac7e 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/layout/ImageLayout.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/layout/ImageLayout.kt
@@ -72,12 +72,12 @@ interface ImageLayout : HudLayout<ImageElement> {
         override val scale: Double = yamlObject.getAsDouble("scale", 1.0)
         override val space: Int = yamlObject.getAsInt("space", 1)
         override val stack: PlaceholderBuilder<*>? = yamlObject["stack"]?.asString()?.let {
-            PlaceholderManagerImpl.find(it).ifNull("this placeholder doesn't exist: $it").apply {
+            PlaceholderManagerImpl.find(it, this).ifNull("this placeholder doesn't exist: $it").apply {
                 if (clazz !=  java.lang.Number::class.java) throw RuntimeException("this placeholder is not integer: $it")
             }
         }
         override val maxStack: PlaceholderBuilder<*>? = yamlObject["max-stack"]?.asString()?.let {
-            PlaceholderManagerImpl.find(it).ifNull("this placeholder doesn't exist: $it").apply {
+            PlaceholderManagerImpl.find(it, this).ifNull("this placeholder doesn't exist: $it").apply {
                 if (clazz !=  java.lang.Number::class.java) throw RuntimeException("this placeholder is not integer: $it")
             }
         }
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/manager/ListenerManagerImpl.kt b/dist/src/main/kotlin/kr/toxicity/hud/manager/ListenerManagerImpl.kt
index b4d8c85a..feb05436 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/manager/ListenerManagerImpl.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/manager/ListenerManagerImpl.kt
@@ -4,6 +4,7 @@ import kr.toxicity.hud.api.listener.HudListener
 import kr.toxicity.hud.api.manager.ListenerManager
 import kr.toxicity.hud.api.update.UpdateEvent
 import kr.toxicity.hud.api.yaml.YamlObject
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.resource.GlobalResource
 import kr.toxicity.hud.util.ifNull
 import net.kyori.adventure.audience.Audience
@@ -14,8 +15,9 @@ object ListenerManagerImpl : BetterHudManager, ListenerManager {
 
     private val listenerMap = mutableMapOf<String, (YamlObject) -> (UpdateEvent) -> HudListener>(
         "placeholder" to placeholder@ { c ->
-            val v = PlaceholderManagerImpl.find(c["value"]?.asString().ifNull("value value not set."))
-            val m = PlaceholderManagerImpl.find(c["max"]?.asString().ifNull("max value not set."))
+            val source = PlaceholderSource.Impl(c)
+            val v = PlaceholderManagerImpl.find(c["value"]?.asString().ifNull("value value not set."), source)
+            val m = PlaceholderManagerImpl.find(c["max"]?.asString().ifNull("max value not set."), source)
             return@placeholder { event ->
                 val value = v build event
                 val max = m build event
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/manager/PlaceholderManagerImpl.kt b/dist/src/main/kotlin/kr/toxicity/hud/manager/PlaceholderManagerImpl.kt
index bc93906b..ec14a4f2 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/manager/PlaceholderManagerImpl.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/manager/PlaceholderManagerImpl.kt
@@ -5,10 +5,14 @@ import kr.toxicity.hud.api.placeholder.HudPlaceholder
 import kr.toxicity.hud.api.placeholder.PlaceholderContainer
 import kr.toxicity.hud.api.player.HudPlayer
 import kr.toxicity.hud.api.update.UpdateEvent
+import kr.toxicity.hud.api.yaml.YamlElement
+import kr.toxicity.hud.api.yaml.YamlObject
 import kr.toxicity.hud.equation.TEquation
 import kr.toxicity.hud.placeholder.Placeholder
 import kr.toxicity.hud.placeholder.PlaceholderBuilder
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.resource.GlobalResource
+import kr.toxicity.hud.util.ifNull
 import net.kyori.adventure.audience.Audience
 import java.text.DecimalFormat
 import java.util.Collections
@@ -16,6 +20,7 @@ import java.util.function.Function
 import java.util.regex.Pattern
 
 object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
+
     private val castPattern = Pattern.compile("(\\((?<type>[a-zA-Z]+)\\))")
     private val stringPattern = Pattern.compile("'(?<content>[\\w|\\W]+)'")
     private val equationPatter = Pattern.compile("(@(?<equation>(([()\\-+*./% ]|[a-zA-Z]|[0-9])+)))")
@@ -23,6 +28,7 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
     private val doubleDecimal = DecimalFormat("#.###")
 
     private val number = PlaceholderContainerImpl(
+        "number",
         java.lang.Number::class.java,
         0.0,
         mapOf<String, HudPlaceholder<Number>>(
@@ -44,13 +50,24 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
                     }
                 }
             },
-        ), {
+        ),
+        {
             it.toDoubleOrNull()
-        }, {
+        },
+        {
             doubleDecimal.format(it)
+        },
+        mapOf(
+            "evaluate" to { n, e ->
+                TEquation(e.asString()).evaluate(n.toDouble())
+            }
+        ),
+        { a, b ->
+            DecimalFormat(b).format(a)
         }
     )
     private val string = PlaceholderContainerImpl(
+        "string",
         java.lang.String::class.java,
         "<none>",
         mapOf(
@@ -62,14 +79,41 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
                     }
                 }
             },
-        ), {
+        ),
+        {
             val matcher = stringPattern.matcher(it)
             if (matcher.find()) matcher.group("content") else null
-        }, {
+        },
+        {
             it.toString()
+        },
+        mapOf(
+            "trim" to { s, e ->
+                if (e.asBoolean()) s.trim() else s
+            },
+            "join" to { s, e ->
+                val j = e.asString()
+                buildString {
+                    val point = s.codePoints().toArray()
+                    point.forEachIndexed { index, c ->
+                        appendCodePoint(c)
+                        if (index < point.lastIndex) append(j)
+                    }
+                }
+            },
+            "replace" to { s, e ->
+                val obj = e.asObject()
+                val from = obj["from"].ifNull("Cannot find 'from' section.").asString()
+                val to = obj["to"].ifNull("Cannot find 'to' section.").asString()
+                s.replace(from, to)
+            }
+        ),
+        { a, _ ->
+            a.toString()
         }
     )
     private val boolean = PlaceholderContainerImpl(
+        "boolean",
         java.lang.Boolean::class.java,
         false,
         mapOf(
@@ -81,14 +125,24 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
                     }
                 }
             }
-        ), {
+        ),
+        {
             when (it) {
                 "true" -> true
                 "false" -> false
                 else -> null
             }
-        }, {
+        },
+        {
             it.toString()
+        },
+        mapOf(
+            "reversed" to { b, e ->
+                if (e.asBoolean()) !b else b
+            }
+        ),
+        { a, _ ->
+            a.toString()
         }
     )
 
@@ -99,22 +153,58 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
     )
 
     class PlaceholderContainerImpl<T, R>(
+        val name: String,
         val clazz: Class<R>,
         val defaultValue: T,
         private val defaultMap: Map<String, HudPlaceholder<T>>,
         val parser: (String) -> T?,
-        val stringMapper: (R) -> String
+        val stringMapper: (R) -> String,
+        private val optionApplier: Map<String, (T, YamlElement) -> T> = emptyMap(),
+        private val optionStringApplier: (R, String) -> String
     ) : PlaceholderContainer<T> {
-        val map = HashMap(defaultMap)
+        private val map = HashMap(defaultMap)
 
         fun init() {
             map.clear()
             map += defaultMap
         }
 
-        fun stringValue(any: Any): String {
-            return if (clazz.isAssignableFrom(any.javaClass)) stringMapper(clazz.cast(any))
-            else any.toString()
+        fun get(key: String, option: YamlObject): HudPlaceholder<T>? {
+            val get = map[key] ?: return null
+            val appliers = option.mapNotNull { (key, element) ->
+                optionApplier[key]?.let {
+                    { value: T ->
+                        it(value, element)
+                    }
+                }
+            }
+            return if (appliers.isEmpty()) get else object : HudPlaceholder<T> by get {
+                override fun invoke(args: MutableList<String>, reason: UpdateEvent): Function<HudPlayer, T> {
+                    val func = get(args, reason)
+                    return Function {
+                        var value = func.apply(it)
+                        appliers.forEach {
+                            value = it(value)
+                        }
+                        value
+                    }
+                }
+            }
+        }
+
+        fun stringValue(option: YamlObject): (Any) -> String {
+            val applier = option[name]?.asString()?.let {
+                { value: Any ->
+                    optionStringApplier(clazz.cast(value), it)
+                }
+            } ?: { value: Any ->
+                stringMapper(clazz.cast(value))
+            }
+            return { any ->
+                if (clazz.isAssignableFrom(any.javaClass)) {
+                    applier(any)
+                } else any.toString()
+            }
         }
 
         override fun addPlaceholder(name: String, placeholder: HudPlaceholder<T>) {
@@ -124,7 +214,8 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
         override fun getAllPlaceholders(): Map<String, HudPlaceholder<*>> = Collections.unmodifiableMap(map)
     }
 
-    fun find(target: String): PlaceholderBuilder<*> {
+    fun find(target: String, source: PlaceholderSource): PlaceholderBuilder<*> {
+        val (option, stringOption) = source.placeholderOption to source.stringPlaceholderFormat
         val equation = equationPatter.matcher(target)
         val numberMapper: (Double) -> Double = if (equation.find()) {
             TEquation(equation.group("equation")).let { mapper ->
@@ -147,7 +238,7 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
 
         val args = if (pattern.length > head.length + 1) pattern.substring(head.length + 1).split(',') else emptyList()
         val get = types.values.firstNotNullOfOrNull {
-            it.map[first]?.let { mapper ->
+            it.get(first, option)?.let { mapper ->
                 it to mapper
             }
         } ?: types.values.firstNotNullOfOrNull {
@@ -164,6 +255,8 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
 
         val type = types[group]
 
+        val stringMapper = type?.stringValue(stringOption) ?: get.first.stringValue(stringOption)
+
         return object : PlaceholderBuilder<Any> {
             override val clazz: Class<out Any>
                 get() = type?.clazz ?: get.first.clazz
@@ -186,15 +279,14 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
                     }
 
                     override fun stringValue(player: HudPlayer): String {
-                        val value = invoke(player)
-                        return type?.stringValue(value) ?: get.first.stringValue(value)
+                        return stringMapper(invoke(player))
                     }
                 }
             }
         }
     }
 
-    fun parse(target: String): (UpdateEvent) -> (HudPlayer) -> String {
+    fun parse(target: String, source: PlaceholderSource): (UpdateEvent) -> (HudPlayer) -> String {
         var skip = false
         val builder = ArrayList<(UpdateEvent) -> (HudPlayer) -> String>()
         val sb = StringBuilder()
@@ -204,7 +296,7 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
                     '/' -> skip = true
                     '[' -> {
                         val build = sb.toString()
-                        builder.add {
+                        builder += {
                             {
                                 build
                             }
@@ -215,9 +307,9 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
                     ']' -> {
                         val result = sb.toString()
                         sb.setLength(0)
-                        val find = find(result)
+                        val find = find(result, source)
                         runCatching {
-                            builder.add { r ->
+                            builder += { r ->
                                 (find build r).let { b ->
                                     {
                                         b.stringValue(it)
@@ -238,7 +330,7 @@ object PlaceholderManagerImpl : PlaceholderManager, BetterHudManager {
         }
         if (sb.isNotEmpty()) {
             val build = sb.toString()
-            builder.add {
+            builder += {
                 {
                     build
                 }
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/pack/PackFile.kt b/dist/src/main/kotlin/kr/toxicity/hud/pack/PackFile.kt
index 13c8f213..7fcd9de6 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/pack/PackFile.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/pack/PackFile.kt
@@ -3,4 +3,4 @@ package kr.toxicity.hud.pack
 class PackFile(
     val path: String,
     val array: () -> ByteArray
-)
\ No newline at end of file
+) : () -> ByteArray by array
\ No newline at end of file
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/pack/PackGenerator.kt b/dist/src/main/kotlin/kr/toxicity/hud/pack/PackGenerator.kt
index 352c28bc..6a4481c8 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/pack/PackGenerator.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/pack/PackGenerator.kt
@@ -40,7 +40,7 @@ object PackGenerator {
 
         fun save(packFile: PackFile) {
             val replace = packFile.path.replace('/', File.separatorChar)
-            val arr = packFile.array()
+            val arr = packFile()
             synchronized(this) {
                 byte += arr.size
                 byteArrayMap[packFile.path] = arr
@@ -105,7 +105,7 @@ object PackGenerator {
                         }
 
                         override fun invoke(p1: PackFile) {
-                            val byte = p1.array()
+                            val byte = p1()
                             synchronized(builder) {
                                 builder.byte += byte.size
                                 builder.byteArrayMap[p1.path] = byte
@@ -157,14 +157,16 @@ object PackGenerator {
                     })
                     fun addEntry(entry: ZipEntry, byte: ByteArray) {
                         synchronized(zip) {
-                            zip.byteArrayMap[entry.name] = byte
-                            zip.byte += byte.size
-                            zip.zip.putNextEntry(entry)
-                            zip.zip.write(byte)
-                            zip.zip.closeEntry()
-                            if (protection) {
-                                entry.crc = byte.size.toLong()
-                                entry.size = BigInteger(byte).mod(BigInteger.valueOf(Long.MAX_VALUE)).toLong()
+                            runWithExceptionHandling(sender, "Unable to write this file: ${entry.name}") {
+                                zip.byteArrayMap[entry.name] = byte
+                                zip.byte += byte.size
+                                zip.zip.putNextEntry(entry)
+                                zip.zip.write(byte)
+                                zip.zip.closeEntry()
+                                if (protection) {
+                                    entry.crc = byte.size.toLong()
+                                    entry.size = BigInteger(byte).mod(BigInteger.valueOf(Long.MAX_VALUE)).toLong()
+                                }
                             }
                         }
                     }
@@ -203,7 +205,7 @@ object PackGenerator {
 
                         override fun invoke(p1: PackFile) {
                             val entry = ZipEntry(p1.path)
-                            val byte = p1.array()
+                            val byte = p1()
                             addEntry(entry, byte)
                         }
                     }
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ColorOverride.kt b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ColorOverride.kt
index 3ae1c5fb..dfecb44a 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ColorOverride.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ColorOverride.kt
@@ -30,9 +30,9 @@ fun interface ColorOverride : (HudPlayer) -> TextColor? {
             pair += builder to color
         }
 
-        fun conditional(yaml: YamlObject) {
+        fun conditional(yaml: YamlObject, source: PlaceholderSource) {
             conditional(
-                yaml.toConditions(),
+                yaml.toConditions(source),
                 yaml["color"]
                     .ifNull("'color' section not found.")
                     .asString()
@@ -58,10 +58,10 @@ fun interface ColorOverride : (HudPlayer) -> TextColor? {
                 null
             }
         }
-        fun builder(yaml: YamlObject) : Builder {
+        fun builder(yaml: YamlObject, source: PlaceholderSource) : Builder {
             return YamlBuilder().apply {
                 yaml.forEach {
-                    conditional(it.value.asObject())
+                    conditional(it.value.asObject(), source)
                 }
                 defaultColor = yaml["default-color"]?.asString()?.toTextColor()
             }
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ConditionSource.kt b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ConditionSource.kt
index f5b65949..09a39062 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ConditionSource.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/ConditionSource.kt
@@ -15,15 +15,15 @@ interface ConditionSource {
 
     class Impl(
         override val colorOverrides: ColorOverride.Builder,
-        override val conditions: ConditionBuilder
+        override val conditions: ConditionBuilder,
     ) : ConditionSource {
-        constructor(yamlObject: YamlObject): this(
-            yamlObject.toColorOverrides(),
-            yamlObject.toConditions()
+        constructor(yamlObject: YamlObject, source: PlaceholderSource): this(
+            yamlObject.toColorOverrides(source),
+            yamlObject.toConditions(source),
         )
-        constructor(parent: ConditionSource, yamlObject: YamlObject): this(
-            parent.colorOverrides + yamlObject.toColorOverrides(),
-            parent.conditions and yamlObject.toConditions()
+        constructor(yamlObject: YamlObject): this(
+            yamlObject,
+            PlaceholderSource.Impl(yamlObject)
         )
     }
 }
\ No newline at end of file
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/Conditions.kt b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/Conditions.kt
index 614cf438..0f8f3fd5 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/Conditions.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/Conditions.kt
@@ -7,11 +7,11 @@ import kr.toxicity.hud.util.ifNull
 import kr.toxicity.hud.util.warn
 
 object Conditions {
-    fun parse(section: YamlObject, defaultBuilder: ConditionBuilder = ConditionBuilder.alwaysTrue): ConditionBuilder {
-        var value: ConditionBuilder = defaultBuilder
+    fun parse(section: YamlObject, source: PlaceholderSource): ConditionBuilder {
+        var value: ConditionBuilder = ConditionBuilder.alwaysTrue
         section.forEachSubConfiguration { s, yamlObject ->
             runCatching {
-                val new = parse0(yamlObject)
+                val new = parse0(yamlObject, source)
                 value = when (val gate = yamlObject["gate"]?.asString() ?: "and") {
                     "and" -> value and new
                     "or" -> value or new
@@ -30,9 +30,9 @@ object Conditions {
     }
 
     @Suppress("UNCHECKED_CAST")
-    private fun parse0(section: YamlObject): ConditionBuilder {
-        val first = PlaceholderManagerImpl.find(section["first"]?.asString().ifNull("first value not set."))
-        val second = PlaceholderManagerImpl.find(section["second"]?.asString().ifNull("second value not set."))
+    private fun parse0(section: YamlObject, source: PlaceholderSource): ConditionBuilder {
+        val first = PlaceholderManagerImpl.find(section["first"]?.asString().ifNull("first value not set."), source)
+        val second = PlaceholderManagerImpl.find(section["second"]?.asString().ifNull("second value not set."), source)
         val operationValue = section["operation"]?.asString().ifNull("operation value not set")
 
         if (first.clazz != second.clazz) throw RuntimeException("type mismatch: ${first.clazz.simpleName} and ${second.clazz.simpleName}")
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/placeholder/PlaceholderSource.kt b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/PlaceholderSource.kt
new file mode 100644
index 00000000..ff3e6136
--- /dev/null
+++ b/dist/src/main/kotlin/kr/toxicity/hud/placeholder/PlaceholderSource.kt
@@ -0,0 +1,19 @@
+package kr.toxicity.hud.placeholder
+
+import kr.toxicity.hud.api.yaml.YamlObject
+import kr.toxicity.hud.yaml.YamlObjectImpl
+
+interface PlaceholderSource {
+    val placeholderOption: YamlObject
+    val stringPlaceholderFormat: YamlObject
+
+    class Impl(
+        override val placeholderOption: YamlObject,
+        override val stringPlaceholderFormat: YamlObject
+    ) : PlaceholderSource {
+        constructor(source: YamlObject): this(
+            source["placeholder-option"]?.asObject() ?: YamlObjectImpl.empty,
+            source["placeholder-string-format"]?.asObject() ?: YamlObjectImpl.empty
+        )
+    }
+}
\ No newline at end of file
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/popup/PopupImpl.kt b/dist/src/main/kotlin/kr/toxicity/hud/popup/PopupImpl.kt
index 3169cb76..28ba566c 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/popup/PopupImpl.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/popup/PopupImpl.kt
@@ -15,6 +15,7 @@ import kr.toxicity.hud.location.PixelLocation
 import kr.toxicity.hud.manager.*
 import kr.toxicity.hud.pack.PackGenerator
 import kr.toxicity.hud.location.GuiLocation
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.resource.GlobalResource
 import kr.toxicity.hud.util.*
 import java.util.*
@@ -24,7 +25,7 @@ class PopupImpl(
     resource: GlobalResource,
     val internalName: String,
     section: YamlObject
-) : Popup, HudConfiguration {
+) : Popup, HudConfiguration, PlaceholderSource by PlaceholderSource.Impl(section) {
     val gui = GuiLocation(section)
     val move = section["move"]?.asObject()?.let {
         EquationPairLocation(it)
@@ -38,7 +39,7 @@ class PopupImpl(
     private val default = ConfigManagerImpl.defaultPopup.contains(internalName) || section.getAsBoolean("default", false)
     private val keyMapping = section.getAsBoolean("key-mapping", false)
     private val index: ((UpdateEvent) -> (HudPlayer) -> Int)? = section["index"]?.asString()?.let {
-        PlaceholderManagerImpl.find(it).apply {
+        PlaceholderManagerImpl.find(it, this).apply {
             if (clazz != java.lang.Number::class.java) throw RuntimeException("this index is not a number. it is ${clazz.simpleName}.")
         }.let {
             { reason ->
@@ -92,7 +93,7 @@ class PopupImpl(
         throw RuntimeException("layouts is empty.")
     }
 
-    private val conditions = section.toConditions()
+    private val conditions = section.toConditions(this)
 
     init {
         val task = task@ { event: UpdateEvent, uuid: UUID ->
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/renderer/HeadRenderer.kt b/dist/src/main/kotlin/kr/toxicity/hud/renderer/HeadRenderer.kt
index f7af12ab..19397418 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/renderer/HeadRenderer.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/renderer/HeadRenderer.kt
@@ -124,7 +124,7 @@ class HeadRenderer(
 
 
     private val followPlayer = follow?.let {
-        PlaceholderManagerImpl.find(it).apply {
+        PlaceholderManagerImpl.find(it, this).apply {
             if (!java.lang.String::class.java.isAssignableFrom(clazz)) throw RuntimeException("This placeholder is not a string: $it")
         }
     }
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/renderer/ImageRenderer.kt b/dist/src/main/kotlin/kr/toxicity/hud/renderer/ImageRenderer.kt
index be2b4197..689c3c57 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/renderer/ImageRenderer.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/renderer/ImageRenderer.kt
@@ -18,7 +18,7 @@ class ImageRenderer(
     component: ImageComponent
 ) : ImageLayout by layout {
     private val followHudPlayer = follow?.let {
-        PlaceholderManagerImpl.find(it).apply {
+        PlaceholderManagerImpl.find(it, this).apply {
             if (!java.lang.String::class.java.isAssignableFrom(clazz)) throw RuntimeException("This placeholder is not a string: $it")
         }
     }
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/renderer/TextRenderer.kt b/dist/src/main/kotlin/kr/toxicity/hud/renderer/TextRenderer.kt
index 051a971e..f5529b4a 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/renderer/TextRenderer.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/renderer/TextRenderer.kt
@@ -30,12 +30,12 @@ class TextRenderer(
     }
 
     private val followHudPlayer = follow?.let {
-        PlaceholderManagerImpl.find(it).apply {
+        PlaceholderManagerImpl.find(it, this).apply {
             if (!java.lang.String::class.java.isAssignableFrom(clazz)) throw RuntimeException("This placeholder is not a string: $it")
         }
     }
 
-    private val parsedPatter = PlaceholderManagerImpl.parse(pattern)
+    private val parsedPatter = PlaceholderManagerImpl.parse(pattern, this)
 
     private val imageCharMapGet = imageCharMap
 
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/util/Functions.kt b/dist/src/main/kotlin/kr/toxicity/hud/util/Functions.kt
index 98b51d80..100d9cca 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/util/Functions.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/util/Functions.kt
@@ -18,7 +18,12 @@ fun <R> runWithExceptionHandling(sender: Audience, message: String, block: () ->
         sender.warn(message)
         sender.warn("Reason: ${it.message ?: it.javaClass.name}")
     }
-    if (ConfigManagerImpl.debug) it.printStackTrace()
+    if (ConfigManagerImpl.debug) {
+        warn(
+            "Stack trace:",
+            it.stackTraceToString()
+        )
+    }
 }
 
 fun <T, R> T.runWithExceptionHandling(sender: Audience, message: String, block: T.() -> R) = runCatching(block).onFailure {
@@ -26,5 +31,10 @@ fun <T, R> T.runWithExceptionHandling(sender: Audience, message: String, block:
         sender.warn(message)
         sender.warn("Reason: ${it.message ?: it.javaClass.name}")
     }
-    if (ConfigManagerImpl.debug) it.printStackTrace()
+    if (ConfigManagerImpl.debug) {
+        warn(
+            "Stack trace:",
+            it.stackTraceToString()
+        )
+    }
 }
\ No newline at end of file
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/util/Yamls.kt b/dist/src/main/kotlin/kr/toxicity/hud/util/Yamls.kt
index 19820678..4e9fc665 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/util/Yamls.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/util/Yamls.kt
@@ -6,6 +6,7 @@ import kr.toxicity.hud.equation.TEquation
 import kr.toxicity.hud.placeholder.ColorOverride
 import kr.toxicity.hud.placeholder.ConditionBuilder
 import kr.toxicity.hud.placeholder.Conditions
+import kr.toxicity.hud.placeholder.PlaceholderSource
 import kr.toxicity.hud.yaml.YamlArrayImpl
 import kr.toxicity.hud.yaml.YamlElementImpl
 import kr.toxicity.hud.yaml.YamlObjectImpl
@@ -59,11 +60,11 @@ fun File.forEachAllYaml(sender: Audience, block: (File, String, YamlObject) -> U
         }
     }
 }
-fun YamlObject.toConditions() = get("conditions")?.asObject()?.let {
-    Conditions.parse(it)
+fun YamlObject.toConditions(source: PlaceholderSource) = get("conditions")?.asObject()?.let {
+    Conditions.parse(it, source)
 } ?: ConditionBuilder.alwaysTrue
-fun YamlObject.toColorOverrides() = get("color-overrides")?.asObject()?.let {
-    ColorOverride.builder(it)
+fun YamlObject.toColorOverrides(source: PlaceholderSource) = get("color-overrides")?.asObject()?.let {
+    ColorOverride.builder(it, source)
 } ?: ColorOverride.empty
 
 fun YamlObject.getTEquation(key: String) = get(key)?.asString()?.let {
diff --git a/dist/src/main/kotlin/kr/toxicity/hud/yaml/YamlObjectImpl.kt b/dist/src/main/kotlin/kr/toxicity/hud/yaml/YamlObjectImpl.kt
index 9acfd64a..2cd2642e 100644
--- a/dist/src/main/kotlin/kr/toxicity/hud/yaml/YamlObjectImpl.kt
+++ b/dist/src/main/kotlin/kr/toxicity/hud/yaml/YamlObjectImpl.kt
@@ -11,6 +11,9 @@ class YamlObjectImpl(
     path: String,
     private val map: MutableMap<*, *>
 ) : YamlConfigurationImpl(path), YamlObject {
+    companion object {
+        val empty = YamlObjectImpl("", HashMap<Any, Any>())
+    }
 
     override fun save(file: File) {
         get().saveToYaml(file)