Greninja (41/146) (Cosmos Holo) (Blister Exclusive) [XY: Base Set] Lightning When this card is Tribute

When this card is Tribute Summoned by Tributing a "Steelswarm" monster(s)

Set: Labyrinth of Nightmare Card type: Fusion Monster Rarity: Common Attack: 2800 Defense: 2000 "The Forgiving Maiden" + "Marie the Fallen One"

Once per turn: You can detach 2 Xyz Materials from this card

Set: The Lost Millennium Card type: Normal Trap Rarity: Ultimate Rare You can only activate this card when a monster on your side of the field is destroyed and sent to the Graveyard as a result of battle

by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")

Greninja (41/146) (Cosmos Holo) (Blister Exclusive) [XY: Base Set] Lightning When this card is TributeSet: XY: Base Set Type: Water Rarity: Holo Rare Retreat cost: Colorless