[ 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), you may pay the cost. If you do, choose one of your rear-guards, that unit and your vanguard get [Power]+4000 until end of that battle for each of your circles without a unit. After that, if the chosen rear-guard's [Power] is 20000 or greater, draw a card.