Bolt Blamer Dragon

[AUTO](RC):When this unit attacks a vanguard, if you have a vanguard with "Scarlet Flame" in its card name, this unit gets [Power] +5000 until end of that battle. At the end of that battle, [COST][Counter-Blast 1 & retire this unit], choose one of your opponent's rear-guards, and retire it. If it was not retired, draw a card, choose a card from your drop, and bind it face down.