I’m a Villainess but So Popular - Chapter 128: Side Story 1 : Summer Vacation

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

When Su Jiu dies on her eighteenth birthday, she transmigrates into a novel about painful love and becomes an adorable four-year-old child.

Mythological revival, Blue Planet suddenly expanded hundreds of times, countless creatures from ancient myths appeared, dividing territories.Strange beasts from the Classic of Mountains and Seas, apocalyptic beasts from Western mythology, colossal demonic bodies from the deep sea...Xu Zhou traveled to this dangerous parallel world and discovered that he had a clone of a giant rooster.Moreover, he obtained the talent to gain one kilogram every day.This talent continued to upgrade with the evolution of the clone, one hundred kilograms a day, ten thousand kilograms a day...From then on, a Kun with unlimited growth ability started to grow infinitely, gradually evolving into a mythical beast.One thousand jin, ten thousand jin, one hundred thousand jin...Years later.“My current weight is 90 trillion trillion tons, with a punch that can kill a mythical creature.” In the starry sky, Xu Zhou stared at a mythical giant beast in the void, with icy killing intent in his eyes.The next second, the planet-sized body surged suddenly...

“From today onwards, you will become the Envoy of one of the Main Gods in the Dimensions of Gods. You will travel from one world to another and through that, you will attain what others will never obtain in their entire life.”