Roaring Thunder Dragon, Triumph Dragon

: 1, search your deck for up to one card with the same card name as this unit, reveal it and put it into hand, shuffle the deck, and this unit gets +10000 until end of turn. :When this unit attacks a vanguard, 4, choose one of your opponent's rear-guards, retire it, and this unit gets +5000/ +１until end of that battle. (Use four Energy to pay 4!)