Blue Storm Deterrence Dragon, Ice Barrier Dragon

(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. Wave‐1st time or 4th time or more (Active during the specified battles of each turn):When this unit is placed on , this unit gets +10000 until end of that battle.