The Thief Die is an expansion die for Dungeon Dice. It was previously only available in the Five-Player Booster Pack, but is now available on its own to add to your games of Dungeon Dice! The Thief has already opened the chest, and is now using its contents against you. When fighting the Thief, you draw a die of the appropriate type (as shown on the bottom right of the Thief die) and roll it together with the Thiefs level dice. If you defeat him, you get to keep what the Thief tried to steal!