Or, we realize that in the time it takes for a Burning-deck to get phoenix feather, wildfire gem, and Phoenix in hand, played, and the resources for it, the opponents deck could:
-Lower your Magic/gems
-Lower your overall stock
-Lower your tower so much, with good enough defense, that he'd kill you with searing fire
-Discard Phoenix
-Win
-Win with one of the cards NOT discarded by Flare Attack.