Blue Storm Deterrence Dragon, Ice Barrier Dragon (G-BT09/S12EN) [Divine Dragon Caper]

[ G guardian ] (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" from your hand, and discard it] Call this card to your (GC) from face down. [AUTO] Wave-1st or 4th time or more (Active during the specified battles of each turn) : When this unit is placed on (GC), this unit gets [Shield]+10000.