Im not sure if anyone else noticed but there's an area in the grand chasm with the vaults and all the rectangles with bridges connecting them(not sure if that's a very good description) where some of the minions wandering around show that they are ice but their out fit is black, white, and grey with the death symbol all over it! I haven't battled them so I'm not sure if their spells are ice or death but it seems odd that they would be wearing the death symbol and the death colors but they're ice
