Krark, the Thumbless (Rainbow Foil) [Secret Lair Drop Series] Animal Colosseum Promos Fusion Summon 1 Fusion Monster

Fusion Summon 1 Fusion Monster from your Extra Deck that lists that monster on the field as Fusion Material

Cannot be destroyed by battle or card effects

Set: Labyrinth of Nightmare Card type: Normal Trap Rarity: Super Rare Attack: 0 Defense: 0 Activate only when an opponent's monster declares an attack

they sacrifice it unless they pay its echo cost

Krark, the Thumbless (Rainbow Foil) [Secret Lair Drop Series] Animal Colosseum Promos Fusion Summon 1 Fusion MonsterSet: Secret Lair Drop Series Type: Legendary Creature Goblin Wizard Rarity: Rare Cost: {1}{R} Whenever you cast an instant or sorcery spell, flip a coin. If you lose the flip, return that spell to its owner's hand. If you win the flip, copy that spell, and you may choose new targets for the copy. Partner (You can have two commanders if both have partner.)