mobs u could add

while i was playing a diffrent game i realized it would be cool if you guys added something like the warden but it can drag you in and light you on fire for a short period of time. When killed it should drop a really strong but rare sword or piece of armor that can be used, or make a dungen where you have to find it and kill it. When killed it could drop a key that brings you to good loot and riches like diamond blocks,gold blocks,a few netherite block,and iron blocks.