Mutant Deity Fortification, Grysfort

(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. : 1 When this unit is placed on during the battle that your vanguard was attacked by your opponent's vanguard, you may pay the cost. If you do, all of the units in your opponent's back row, and this unit gets +5000 for every two of your opponent's units in until end of that battle.