Swallowed Star: I Am the Lord of a Galaxy

While cultivating, Luo Yunfei was taken on as a disciple by several powerful figures and practiced the Great Dao. He transmigrated back to the modern city, only to find that countless monsters had appeared on Earth. Humanity was utterly defeated, with only a sliver of habitable land left. People discovered another way to cultivate.

Humanity also developed a suit called Black Armor that could enhance its wearers, gaining people a great deal of ground to survive.