Dragon's Seal

■ Set (This card remains on the field)

■ [Cast Cost] Put the top three cards of your deck into this card's soul face down.

■ Counter [Act] If your life is 3 or less, you may reveal all cards in this card's soul. If you do, choose up to one 《Armordragon》 monster from among them, call it by paying its [Call Cost], and destroy this card.