Hello,
I woud love to have custom npc like factions that can be created by players to allow other player to control them for combat. But disassemble the trading editing for other player then the one how create.
The ability too sell modified npc and save them in a files or in a folder so that can be recuparable later on an other world/server.
For 1.20.1 & epic fight support that woud neat of your part.

I'am not english sorry for any mispell world
if the request is not clear at certain point please tel my so i can reformulate it.