The Zero Mage

Abandoned at birth for having zero magic, Orion returns fifteen years later and kills the Skeleton Dragon King with one blow. Revealed as the Sanctum Lord's lost son, he is mocked as a "waste" when the undead calamity strikes. But when the Undead King mortally wounds his father, Orion unleashes supreme magic and annihilates him. The dying King curses the living; the High Temple offers to execute Orion in exchange for retreat. Orion reverses time, shatters the curse, and falls into darkness. Waking with an Arcane Heart for a heart, he learns his family has been taken for judgment—and sets out to rescue them.