Flareblow Dragon: DZ Booster Set 02: Illusionless Strife

[AUTO]:When this unit is placed on (RC) during your main phase, if you have a grade 3 or greater vanguard with Gandeeva in its card name, [COST][Counter-Blast 1], choose one of your opponent's rear-guards, and retire it. If you did not retire a card, look at the top three cards of your deck, choose up to one grade 3 or less unit card from among them, call it to (RC), and discard the rest.