Nice creepy set of powers with a theme I might describe as "lolthian." I am using this to build some unusual drow warlocks for a forthcoming scenario. Not sure how many players would want to use these....they're a rather creepy power set, so would most appeal to players who fancy ugly and unpleasant PCs. Haven't noticed any unusual rule gaffs or anything off hand....seems pretty sound. Nice layout and art as well.