Dragonic Blademaster "Kouen"

/:Blaze : 1 When your G unit , you may pay the cost. If you do, choose one of your opponent's rear-guards, retire it, choose one of your units with the blaze ability, and it gets +3000 until end of turn. :At the end of each turn, if your opponent has no rear-guards, choose up to one grade 3 card with the blaze ability from your drop zone, and return it to your hand.