Crystal Skull

If this card is Summoned: Take 1000 damage, then change this card to Defense Position. During the End Phase, if you took no effect damage this turn: You can take 1 Rock monster with 0 ATK from your Deck, and either add it to your hand or Special Summon it. You can only use this effect of "Crystal Skull" once per turn.

Rock WATER Effect Monster 1 effect