"The Sorcerer has few enough allies these days. He has an old servant, a giant call Balphurus, who is very elderly and should not be a threat. He's only still there because he's too old to go somewhere else. There are some constructs like the homunculus that he experimented with when he thought that might be a path to longer existence. Some of them no doubt still lurk around the tower. He has lost interest in most of his regular guards and servants, but he used to have gnolls, bugbears and others."