If a PSY-Frame monster(s) is Special Summoned to your side of the field (except during the Damage Step), you can: Immediately after this effect resolves, Synchro Summon 1 Synchro Monster, using only PSY-Frame monsters you control. At the start of the Damage Step, if a PSY-Frame monster you control battles an opponent s monster: You can discard 1 PSY-Frame monster; your battling monster gains ATK equal to the discarded monster s ATK until the end of this turn.