MTL - Age of Empires From Scratch - Chapter 105 a good example

Synopsis: Apocalypse King: The Return of LucianLucian died in the apocalypse—betrayed, powerless, and consumed by the undead. But fate gave him a second chance. Reborn one month before the end, he awakens with future knowledge, an overpowered system, and a ruthless new personality.This time, he will not be weak. This time, he will rule.With Infinite Storage, he stockpiles weapons, food, and everything necessary to survive the apocalypse. Winning the $3 billion lottery, he builds an impenetrable super shelter, reinforced with military technology, luxury, and high-tech defenses. Using his Beauty Evaluation System, he gathers only the most stunning women—90+ points or higher—into his harem, ensuring their unwavering loyalty.As zombies evolve, superpowers awaken, and the world crumbles into madness, Lucian will steal, conquer, and dominate.No gods. No heroes. Only the Apocalypse King.A brutal, R18+ tale of survival, power, and harem in a world where the strong take everything.

After Wang Mang died, he turned into a giant python, evolving crazily!

With the help of his family, he is getting bigger and bigger!

From the first few meters, tens of meters, to hundreds of meters!

From the Burmese python, to the Titan python, to the deep sea python!

When Wang Mang’s size reached hundreds of meters, the earth’s catastrophe came…

- Description from novelbuddy

Upon awakening, Su Changkong found himself transmigrated to a world thrown into chaos by war and rampaged by demon monsters, where his martial arts talent was mediocre. However, Su Changkong discovered that as long as his own “life span” increased, his talents and potential could also be “limitlessly” enhanced!Cultivating the Health-preserving Fist technique and practicing the qi of longevity! The path to immortality is littered with corpses, and Su Changkong embarked on a Martial Arts path where he would not perish, even if heaven and earth were to be annihilated!

In a morgue filled with the bodies of Uchiha clan members, he opened his eyes...A mysterious voice echoed in his ears...With a bewildered expression, he muttered, “Save the Shinobi world? What does that have to do with me, a mere Uchiha survivor?”