Holy Seraph, Parashel

(Usable when both fighters' vanguards are grade 3 or greater, and the number of face up G guardians in your G zone is three or less)-Opponent Turn's Guard Step-[Choose a card with "[Heal] Heal" from your hand, and discard it] Call this card to your from face down. :During the battle that your opponent's vanguard attacked, if the number of face down cards in your damage zone is two or more, this unit gets +10000, then, if the number of face down cards in your damage zone is three or more, this unit gets +10000.