Activate only by sending 1 "Crystal Beast" card from your Spell & Trap Card Zone to the Graveyard when an opponent's monster declares an attack. Negate the attack, then you can add 1 "Rainbow Dragon" or "Rainbow Dark Dragon" from your Deck to your hand.
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Number: PTDN-EN063
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Rarity: Common
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Attribute Monster Type/Card Type: TRAP /Trap Card
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A / D: 0 / 0