LVAL-EN066 – Hidden Temples of Necrovalley – Rare – Unlimited

Activate only if both a ‘Gravekeeper’s’ monster and ‘Necrovalley’ are on the field. Neither player can Special Summon monsters, except ‘Gravekeeper’s’ monsters. If either a ‘Gravekeeper’s’ monster or ‘Necrovalley’ is not on the field, destroy this card.