Special Order! Mountain Roast ~Breath of the Flame Dragon~ (D-PR/912EN) [D Promo Cards]

Play this with COST [Energy Blast (2)]! Look at the same number of cards from the top of your deck as the number of your opponent's open (RC), choose up to one unit card with grade equal to or less than your vanguard from among them, call it to (RC), and shuffle the deck. If your opponent's rear-guard was retired by your card's ability this turn, that called unit gets [Power]+5000 until end of turn.