Eerie cave creature

Ever since the warden was added back in 1.19, it felt as if the possibilities for new mobs have broadened and what I am suggesting might fit into the category of "creepy". This creature would lurk deep in caves but sometimes near the entrance of the cave at night, its a far stretch but maybe, kinda like the old underwater creature in one of the older mob votes, it could drag you into the cave and maybe take some of your items, however you can hunt it down but it is very dangerous as this creature is very sneaky and agile. This could also be classified as a wandering mini boss or something as well.