Card Rulings:Imperial Tombs of Necrovalley

OCG Rulings

 * This card can be activated during the Damage Step.


 * This card can be activated when a Spell/Trap Card is activated, but it cannot be activated when a Spell/Trap effect is activated.


 * This card can be activated even if the opponent controls both "Necrovalley" and a "Gravekeeper's" monster.