Rebirth
Invincible at the start, no upgrades
It's not a fantasy, it's just an invincible legend at the beginning. There is no system, and the protagonist's belongings at the beginning will have a clear origin.
...
Jiang Chengfeng was reborn, but he lived a harsher life than a slave. He didn't awaken any talents until he was eighteen years old.
Unable to bear the oppression, Jiang Chengfeng spent thirteen years building himself a dagger. The day the sword was completed, he would become invincible.
