When a Spell Card, Trap Card, or monster effect is activated, while both a "Gravekeeper's" monster and "Necrovalley" are on the field: Negate the activation, and if you do, destroy it. You can only activate 1 "Imperial Tombs of Necrovalley" per turn.
![Imperial Tombs of Necrovalley [MAGO-EN089] Rare](http://www.dungeonsandjavas.com/cdn/shop/products/d6270343-beb7-5a51-bc70-81dfdb03801c.jpg?v=1682561300&width=1445)
