Fought one of these, it will hit back doing anywhere from 300 to 2600 hit points of damage. Very slow attacks though. After our group killed this mob, Deathrattle popped soon afterwards.
this "mob" if we can call it like that doesnt attack you, it just seem like a pile of bones. If you attack it, it will eventually start moving and slide off... it's pretty fun to watch. Not sure if it's actually true or was simple coincidence but when low hps, it can make pop one of the regular skelly mob and even the named