Supreme Heavenly Emperor Dragon, Defeat Flare Dragon

-Opponent Turn's Guard Step-[Choose a card with "[Heal] Heal" from your hand, and discard it] Call this card to your from face down. :When placed on during the battle your vanguard with "Overlord" in its card name is attacked by your opponent's vanguard, [ 1 & choose two grade 3 or greater Flame Dragon from your drop zone, and put them on the bottom of your deck in any order], and retire all of the rear-guards in your opponent's back row.