When this card is Normal or Special Summoned from the hand: You can add 1 'Polymerization' from your Deck to your hand. You can pay 500 Life Points: Fusion Summon 1 'Des-Toy' Fusion Monster from your Extra Deck, using monsters from your hand or your side of the field as Fusion Materials. You can only use 1 'Furnimal Owl' effect per turn, and only once that turn.
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