[AUTO]:When this unit is placed on (RC), if you have a grade 3 or greater vanguard with "Petralka" in its card name, [COST][Energy-Blast 3], reveal the top seven cards of your deck, if all of the revealed cards not named "Relation Weaver, Petralka" have different card names, choose up to one grade 3 or less unit card from among the revealed cards, call it to (RC), choose up to one order card from among the revealed cards, put it into hand, and shuffle the deck.