Instinct Crown doesn't have rule elements or an effect

[W00dy1]

If you play an Animal Barbarian and get your hands on an Instinct Crown, you can't actually use the Rage action from the crown.
It would make your unarmed attacks Deadly D8, but you can't even manually fix it by giving your handwraps the Deadly D8 trait yourself.
Handwraps will never roll Deadly D8. Other weapons do, when manually given the trait.

[failwiz]

Regarding deadly d8 trait, it's possible using AdjustStrike to add the trait to strike itself:

{
  "definition": [
    "item:category:unarmed"
  ],
  "key": "AdjustStrike",
  "mode": "add",
  "predicate": [
    "rage"
  ],
  "property": "weapon-traits",
  "value": "deadly-d8"
}

However you'd need to limit it to rage that is used from the crown.

The way to fix this probably would be to add crown adjustments for each instinct (and depending on if you used free action or two action activation) as separate effects.

[failwiz]

Here are the rule elements for the animal instinct crown:
RollOption to enable the crown adjustments:

{
  "key": "RollOption",
  "label": "Instinct Crown (Animal)",
  "option": "instinct-crown-animal",
  "suboptions": [
    {
      "label": "Envision (free)",
      "value": "free-action"
    },
    {
      "label": "Activate (2A)",
      "value": "two-action"
    }
  ],
  "toggleable": true,
  "value": true,
  "selection": "two-action"
}

AdjustStrike for the deadly d8 trait on the animal strikes:

{
  "definition": [
    "item:tag:instinct-unarmed-strike"
  ],
  "key": "AdjustStrike",
  "mode": "add",
  "predicate": [
    {
      "and": [
        "rage",
        "instinct-crown-animal:two-action"
      ]
    }
  ],
  "property": "weapon-traits",
  "value": "deadly-d8"
}

FlatModifier for bonus rage damage

{
  "key": "FlatModifier",
  "label": "Additional Rage Damage",
  "selector": "strike-damage",
  "value": 3,
  "predicate": [
    {
      "and": [
        "instinct-crown-animal:two-action",
        "item:tag:instinct-unarmed-strike"
      ]
    }
  ]
}

And ActiveEffectLike for additional temporary HP:

{
  "key": "ActiveEffectLike",
  "mode": "add",
  "path": "flags.pf2e.rageTempHP",
  "phase": "afterDerived",
  "value": 10,
  "predicate": [
    "instinct-crown-animal"
  ]
}

If you add these RuleElements on the Animal Instinct crown, you should be able to toggle it on in the actions tab, select right activation and then Rage - and get all of the bonuses. I'm not sure how additional rage damage and rage temp hp should work RAW, but since it says "additional", I assumed it should add to the base bon uses from Rage.
Also I'm currently hesitant to make a PR with it because

1. I think I read about Treasure Vault remaster soon-ish so this all could change
2. This feels a bit hacky
3. I would prefer to finish all the instinct crowns at once