The Hammer of Kathandrax is the quest item required to complete Kathandrax's Crusher. It drops from the Chest of Kathandrax, the dungeon reward chest that spawns after killing Ilsundur, Lord of Fire in the Catacombs of Kathandrax. The hammer must be returned to Swithin Nye, who can be found just outside the dungeon in Sacnoth Valley.