McGeebers was a dwarf who led a surprise assault of 30 dwarves against Silverwood after being hired by a human named Matthias, thinking that the entire population of Silverwood had been drugged to sleep. Unfortunately for him the plot had been discovered and the dwarves were surrounded. McGeebers was captured and imprisoned.

McGeebers is the Castrian counterpart of Mike Goldinger, and only appears once, in the adventure Treachery at Silverwood