Black Dragon Ninja

Cannot be Special Summoned, except with the effect of a "Ninja" monster or "Ninjitsu Art" card. Once per turn, during either player's turn: You can send 1 "Ninja" monster and 1 "Ninjitsu Art" card from your hand and/or face-up from your field to the Graveyard, then target 1 monster on the field; banish it. If this face-up card leaves the field: Special Summon as many monsters banished by this card's effect as possible to their owner's field(s).