If this card is Pendulum Summoned or flipped face-up, neither player can Special Summon monsters from the Extra Deck while this card is face-up on the field, except "Amorphage" monsters.
[Pendulum Effect]
While you control an "Amorphage" monster, neither player takes any effect damage. Once per turn, during your Standby Phase, Tribute 1 monster or destroy this card.