I got slain by Invisman, not an unseen hand. Guy's not on the wiki, and searching for it on the fora I found one reference where he's listed as NPCs in
the skyshrine beta thread. My concern is that I have no idea where this guy is, as I'm fairly certain he shouldn't've started hitting me out of thin air in the pool with me and the spider. That spider is now mocking me, daring me to try get his velium spider leg again ...