Set: Structure Deck: Legend of the Crystal Beasts Card Number: SDCB-EN010 Rarity: Common Card Text: Pendulum Effect: Each turn , the first time an "Ultimate Crystal" monster(s) and/or "Crystal Beast" card(s) you control would be destroyed by card effect that turn it is not destroyed. Monster Effect: If a "Crystal Beast" monster you control battles an opponent's monster during damage calculation (Quick Effect): You can Tribute this card from your hand or face-up from your field: your battling monster's ATK/DEF become double its original ATK/DEF during that damage calculation only but it is destroyed at the end of this Damage Step. Name: Crystal Keeper Edition: 1st