How to add custom maps (both server and client side)

[nitoygo]

Is your feature request related to a problem? Please describe.
I think it is a nice-to-have feature if we can have custom maps, like more dungeon levels similar to what we see in anime that have different dungeon levels they can hunt and grind to, or for quests from a guild xD

Describe the solution you'd like
Example: Extend the Dungeon 1,2,3 to reach up to N levels.
This probably needs additional assets, or auto generated maps (similar to Diablo?) with differing monster levels and items.
This can also be connected to the Quest system.

Side Note
There aren't really much to do in MU after a while. Adding some features or enjoyment factor might retain more players