Special Summon 1 Warrior monster from your hand or GY, but if you Special Summoned a non-"Heroic" monster by this effect, negate its effects, also it cannot attack. If your LP are 500 or less: You can banish this card from your GY, then target 1 face-up monster you control; it gains 500 ATK for each "Heroic" card you currently control, and for each "Heroic" card attached to Xyz Monsters you currently control. You can only activate 1 "Heroic Call" per turn.