Great Flash, Iseult G-LD03/003

[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]:[Counter Blast (1)] When this unit is placed on (GC), if you have a vanguard with "Alfred" or "Blaster" in its card name, you may pay the cost. If you do, this unit gets [Shield]+5000 for each of your rear-guards until end of that battle.