Dark. Spellcaster/Fusion/Effect. 7. 2 Gravekeeper's monstersGains ATK/DEF equal to the total original Levels of its Fusion Materials x 100. While Necrovalley is on the field, this card and cards in your Field Zone cannot be destroyed by card effects. During your Main Phase: you can activate this effect; Add 1 Gravekeepers monster or 1 Necrovalley card from your Deck to your hand during the End Phase of this turn. You can only this effect of "Gravekeeper's Supernaturalist" once per turn.