The Age of Worms
A giant humanoid-faced spider from the Plane of Shadow, whose true name was Flycatcher. The party encountered him after entering the portal in the Whispering Cairn. He stole Tyrrell off to the Plane of Shadow in the middle of a battle, and refused to return him until some serious bargaining had occurred. As he grew too greedy and untrustworthy, however, Riddle cast mark of doom upon him, and eventually traded himself for Tyrrell. After Riddle dismissed himself from the Plane of Shadow, the party defeated Spitgob.