SDCB-EN010 – Crystal Keeper – Common – 1st Edition

Pendulum EffectEach 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 EffectIf 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.