In his previous life, the plague god Gu Yan Muchan of the immortal realm was ambushed and transmigrated into a body on Earth.
When he woke up, he was a poor medical school dropout who couldn't even afford next month's rent.
But he soon discovered that the oldest forms of life on Earth weren't humans at all, but the microorganisms no one could see. After billions of years of evolution, they had built a system far more sophisticated than anything the immortal realm could comprehend.
While other doctors relied on looking, listening, questioning, and feeling a patient's pulse, he used his “immortal sense” to talk directly to bacteria. While others used medicine to kill microbes, he held “meetings” with viruses and negotiated with them.
Stomach trouble? The Helicobacter pylori is in a bad mood. A little soothing will do the trick. Cancer? It's an imbalance in the microbial communities at the cellular level. Reorganize their “battle formation” and it can be reversed. In his hands, even the most difficult ailments are nothing more than “neighborly disputes” in the microbial world.
With the System at his disposal, he can grind for skills. At first, he levels up like a rocket. Later on, if he wants to gain even one level, he has to scour the whole world for opportunities.
But just as he makes a name for himself on Earth, the aura of the “Super Immortal-Devouring Bacterium” that ambushed him in his previous life quietly resurfaces in the depths of the city...
He heals humans, ghosts, and immortals. To cross realms, he first crosses into the microbial world.
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.