On entering a dungeon (where you find aspects) I killed happily away (as a rogue with a bow), tried to fulfill the dungeon mission (putting something on another something), when suddenly I heard “Aaah, fresh meat!”. The Butcher appeared and attacked me. Being only level 8 I had not much power against him and finally, after running helplessly around and trying to dodge his blows, I died. Somewhere I read, that he has a timer on him, so if you don’t kill him in time, he will disappear. He will also disappear when you die.
I think especially hardcore players should be really carefull on entering dungeons an try to dodge him long enough untill the timer makes him vanish. Perhaps it can be easier for melee classes, but I don’t know.
Nevertheless a really cool easteregg. Perhaps the coolest thing I encountered in this Beta.