One Punch to Slay a God

Thunder roared, a soaring dragon cried out in grief, rain fell like needles, and a holy son perished. Left behind was a cultivation good-for-nothing, who endured humiliation and hardship, rose to power, and became a ruler, only to want to help the holy son be reborn. See how the Sage of Letters unifies the immortal realm, and how the Martial God slays a god with one punch.