These guys hit pretty hard and can sometimes kill my pet before I finish them off. Also they con white and red red to me at level 24 (I couldnt get a spell off on it with all the resists so it must have been pretty red)
it's part of a quest for iksar armor, skeletal hand is one component for gauntlets. made by two npcs in the shadow knight guild in cabalis. I believe its the iksar equivalent of crafted.