Holy Beast, Divine Maskkgal

-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. :[Choose a face down G guardian from your G zone, and turn it face up] When this unit is placed on , if there is a rear-guard in your front row, you may pay the cost. If you do, this unit gets +10000 until end of that battle.