Legendary Black Belt [DR3-EN225] Rare Machine/X Antibody Set: EX: Emerald Type: Colorless

Set: EX: Emerald Type: Colorless Rarity: Uncommon Retreat cost: 0

Whenever Key to the City becomes untapped

Through the pale door

Set: POP Series 4 Type: Psychic Rarity: Common Retreat cost: Colorless

Set: EX: Crystal Guardians Type: Supporter Rarity: Uncommon

Legendary Black Belt [DR3-EN225] Rare Machine/X Antibody Set: EX: Emerald Type: ColorlessSet: Dark Revelation Volume 3 Card type: Equip Spell Rarity: Rare Attack: 0 Defense: 0 Equip only to "Chu Ske the Mouse Fighter", "Monk Fighter", or "Master Monk". When the equipped monster destroys your opponent's monster by battle and sends it to the Graveyard, inflict damage to your opponent equal to the DEF of the destroyed monster.