Ninjitsu Art of Duplication [OP20-EN023] CommonSet: OTS Tournament Pack 20 Card type: Continuous Trap Rarity: Common Tribute 1 "Ninja" monster; Special Summon any number of "Ninja" monsters from your Deck, in face up Attack Position or face down Defense Position, with combined Levels less than or equal to the Level of the Tributed monster. When this card leaves the field: Destroy those monsters. Official Tournament Stores must review their Konami OTS agreement before selling this product.