The Game's Extra: Azhriel Odyssey - Chapter 43: Grave.

This was the era of worldwide auto transformation!At the age of eighteen, everyone could awaken their autos and become auto men!Some awakened off-road vehicles, some awakened sports cars, and some awakened bicycles!By defeating the steel beasts and mechanical abyss monsters, unlocking achievements, and completing missions, one could earn point rewards to purchase various accessories such as firepower, armor, energy, and power cores!Xu Gu transmigrated here and started off by awakening an S-class heavy truck! Unexpectedly, he even had an additional binding to the Ultimate Enhancement System.[S-class heavy truck] got enhanced and became [SSS-class Leader, Optimus]![S-class liquid hydrogen energy core] got enhanced and became [SSS-class portable hydrogen fusion energy core]![SS-class defense force field] got enhanced and became [God-level Supreme Domain]![SSS-class photon pulse cannon] got enhanced and became [Super God-level Annihilator Cannon]!Starting with the Ultimate Enhancement System, with the body of an auto man, Xu Gu conquered the world, dominated countless realms, and proved his invincibility!

SLASH!(So this is death?!!)I, Elysia, found myself dead before even reaching the Demon King's lair, and our Hero Party was completely annihilated.And this was done by none other than a fellow human—my former classmate.He had been mostly invisible during our time at the academy, but then he started committing one crime after another until he became a lackey of the Demon King.Who would have thought that the strongest party of humanity would be wiped out by humanity’s traitors?(If I could go back to the past, I swear I will kill you!)Just when I thought I could finally pass on, I opened my eyes.Five years back, when I first enrolled at Arcadia Academy.And there he was, the traitorous bastard of humanity...****“Huh? Where am I?”One day, I opened my eyes to find myself in an unfamiliar place and came to realize this was the world within the novel Savior's Dawn that I had read.Everything seemed to be proceeding the same as in the novel—except for one thing.The main heroine is glaring at me as though she wants to kill me.Could I survive with the main heroine after my life?

Nine heavens and nine earths, there are many souls.

The strong stand in the nine heavens, like shining stars, while the weak creep on the ground like tiny ants.

The young boy Bai Ye accidentally unlocked the mysterious heavenly soul, cultivated supreme soul skills, guarded the soul and sword, rushed into the nine heavens and swept the stars, and the legend began…

- Description from MTL

Finding himself in an Last Airbender without an airbender around, a transmigrator waterbender goes on an adventure to stop the worst from happening to him.