MTL - A Guide to Raising Your Natural Enemy - Chapter 34 Edgar clarifies

When he returned to the World of Martial Arts, the game was filled with blood and battles! Chen Kaixin had chased after the footsteps of the one emperor, two empresses, three princes, seven dukes, and thirteen aces for three years, but during the eve of the Sword Among Us tournament in Mount Hua, he was ambushed by evil bastards, and was killed so much that his level dropped to that of a newbie. He completely lost the chance to join the ranks of the powerful players in the game! In great disappointment, Kaixin quit the game and got drunk so that he could forget his sadness, but during that stormy night, Chen Kaixin found that he had actually dreamed for a total of three years, because when he woke up again, he woke up to three years ago, when he was still a student.

- Description from Novelupdates

Rael, once a teenager crippled by social anxiety, is reincarnated 1,553 years into the future after reading a book about Milford, the legendary God of Machima—a man who commanded armies of Steelborn, Machnoids, and Autonoms across the universe. Gifted with the Machima Bloodline and guided by Dominica, the World Domination System, Rael quickly rises to become the strongest World Conqueror.He first saw them on the book’s cover—steel women with lifelike faces, beasts with razor limbs, and looming above them all, a god in robes with a mechanical hand raised high. Coiled over him were a gigantic centipede and serpent of metal, guardians of his legend. Now, deep in a junkyard centuries later, Rael forges his own path. His first creation: an unbreakable fortress born in the dirt, a hulking Steelborn Tortoise with a mind sharper than any AI—crafted by Rael’s divine talent. From admiring Milford and wishing to be like him, Rael now marches forward to leave his own mark on the universe.Join him as he rises in rank across his world—and beyond.

As long as hamster spirit Shu Shu can survive the lightning tribulation, then his cultivation will be able to turn him into a human. In the end, the lightning tribulation strikes him and he arrives in the… future?

When I woke up after a pretty crappy death, what greeted me was one of those famous fantasy worlds! I didn’t expect anything like becoming the strongest with a common job, or rising to the top with the weakest class…