Well, I was doing a stockade ******** to lvl my mage. I pulled all the mobs to the beginning, and waited in the wall. As I looked on the minimap and point in the "Mob Train" I saw this strange "Jcffb0b" Entity/Player/Mob/Npc/****. I was like goddammnitagmigottagetthefuckouttahere.
When I did it again later, there were the same thing... Maybe someone knows what it is? Don't think it's something harmful anymore, just curious about it :P