While a "Gravekeeper's" monster(s) and "Necrovalley" are both on the field, monsters your opponent controls lose 500 ATK/DEF. Once per turn, during the Main Phase, if you control no card in your Field Zone: You can activate 1 "Necrovalley" directly from your hand or GY. If this card in your possession is destroyed by an opponent's effect and sent to your GY: You can Set 1 "Necrovalley" Spell/Trap directly from your Deck, except "Necrovalley Temple".
![Necrovalley Temple [MP19-EN205] Common | L.A. Mood Comics and Games](http://lamoodcomics.ca/cdn/shop/products/82f27a0d-72f5-5366-b8c6-089bcd07f08e.png?v=1707420758)
