Doom Bringer High Flame

:When this unit is placed on , choose up to two cards with "Overlord" in their card names from your drop zone, return them to your deck, and if you returned one or more cards, shuffle your deck. If you returned two cards, draw a card. :[Retire this unit] At the beginning of your ride phase, you may pay the cost. If you do, until end of turn, you may without paying the cost the next time you a G unit with "Overlord" in its card name.