Beat of the Ironsong (SUP251) Rainbow Foil - Super Slam

Choose X+1, where X is the number of +1POWER counters on an attacking Dawnblade;
Target Dawnblade attack gets +1POWER.
Target Dawnblade attack gets go again.
Cards defending target Dawnblade attack can't gain DEFENSE.
Damage target Dawnblade attack would deal can't be prevented.