MTL - Immortality: My Spell Upgrades Infinitely - Chapter 275 2 Immortal Techniques, Finally See Tong Xin

In the vast and boundless continent Cangtu, there were ancient sects governing the Ten Old Domains, unworldly immortal clans beyond the Blue Sky, and primordial demon gods dominating the dark abyss that together created a great number of brilliant stories over the long course of the history.

This is a story of Xia An, a transmigrator from the end of the world, who transmigrates into the body of a cannon fodder who was the mother of the villain.

- Description from Wattpad

Reborn as a sword, he lived for hundreds of years, and then he occupied the body of a 15-year-old prince.