| Set: |
Structure Deck: Legend of the Crystal Beasts |
| Card type: |
Pendulum/Effect Monster |
| Rarity: |
Common |
| Attack: |
1500 |
| Defense: |
1800 |
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.
![Crystal Keeper [SDCB-EN010] Common](http://cardcastergames.com/cdn/shop/products/a2f04399-9b33-5268-a257-f21600f98a18_cf9edb8f-7cdf-46b1-940d-fe5a2ccac325_800x.png?v=1702678507)
![Crystal Keeper [SDCB-EN010] Common](http://cardcastergames.com/cdn/shop/products/a2f04399-9b33-5268-a257-f21600f98a18_cf9edb8f-7cdf-46b1-940d-fe5a2ccac325_1024x.png?v=1702678507)
