Me! The Immortal returning from the world of Immortal Martial Arts!

Each major cultivation realm corresponds to one world. The flow of time between different worlds differs by a factor of one percent. As sub-worlds with vastly different styles are opened one by one! A dark Republic of China era, a sinister martial arts world, a blood-moon apocalypse, a continent of secret cults, a kingdom of ten thousand demons, the eternal night of the Great Wasteland... In the main world, I am cautious and prudent. In the sub-worlds, I crush everything in my path. I thrive by transporting resources between the various realms. Relying on infinite longevity and a hundred-fold time difference, whenever things go south, I simply retreat into a sub-world to develop for several hundred years. Unknowingly, I have become the sole living fossil of the great cultivation world. Regardless of the rise and fall of immortal dynasties or the waxing and waning of the realms, I remain steadfast and evergreen throughout the ages! ... (Keywords: Two Worlds, Longevity, Infinite Flow!) (The author has a previous high-quality work, "This Weird Three Kingdoms Game is Too Brutal," with nearly 3 million words and 16,000+ high-tier subscriptions. Updates are stable; read with confidence!)