Bat Illager

I think having a rare illager type that disguises as a bat would be really cool.  Illagers are already quir=te vampire-like, so maybe while caving you accidentally hit the wrong red-eyed bat and it does a minecrafty POOF and then its an illager that is inspired by vampires, so giving it an ability to turn into fake bats and fly around, bite you with a lifesteal move, or become invisible.  The fake bats idea is inspired by the Illusioner's moveset.  I honestly think that this would be a very cool illager type that would add to the caves and cliffs update spectacularly.  Fighting this thing with the creepy cave ambience would be awesome.