There is no experience better than implementation. Though it is sometimes irreversible.
Trigger:
Critical
[AUTO](RC):When your grade 3 or greater vanguard with "Bigbelly" in its card name attacks, [COST][put this unit into soul], draw a card, choose one of your vanguards, and it gets [Power] +5000 until end of that battle.
[AUTO]:When this card is revealed for a damage check, draw a card.