There are plenty of modded mobs that players may want to be invisible to. The base mod only supports vanilla mobs, so I'd like a way to add my own.

I can handle recipes, textures and even creating the actual item through CraftTweaker and ContentTweaker. I'd like to be able to add an item ID and an entity ID to a config somewhere. When the item with the specified item ID is equipped, mobs with the specified entity ID won't be able to see you.

closing this, in 1.16 there are now charms registered for all hostile mobs in game and from next version there's going to be a block list for any entity that mod pack dev doesn't want charm for in their modpack