Dragonic Overlord "The TurnAbout"

:At the end of the battle that it attacked, [ 1 & discard two cards from your hand], all of your front row units with "Overlord" in their card names, and until end of turn, this unit gets drive -1, and if your opponent's vanguard is grade 3 or greater, all of your front row units with "Overlord" in their card names get +10000.