Wise Demonic Lordling, Vapula: D Booster Set 13: Flight of Chakrabarthi

[AUTO](RC):When you Soul Blast (4) or more cards at the same time for the cost of your vanguard's ability, COST [put this unit into soul], and draw a card. Then, choose up to one grade 4 card from your hand, and reveal it. If you revealed a card, or you have a grade 4 or greater vanguard with "Drajeweled" in its card name, choose one of your rear-guards, and if your rear-guard did not [Stand] by a card's ability this turn, [Stand] it.