Taichu Sword Seal

The young man carried a bronze sword box on his back for sixteen years in the forbidden area. He didn't know what was in the box. He only knew that every month when the moon was full, the inscription on the box would burn his back. Once, a monster attacked the sect at night, and he was forced to remove the seal, only to find that there was no sword in the box, only a crack - a crack leading to the battlefield between immortals and demons thousands of years ago. A translucent hand stretched out from the crack, held his wrist, and an old voice sounded: "Don't be afraid, kid, I just want to teach you... How to kill a god."