The countries on the mainland are ruled by three parties: the Holy See, the Mage Tower and the Knight Lords. Magic, fighting energy, alchemy and divine arts coexist, but the one who truly controls the power of "healing" is the Holy See of Holy Glory, which monopolizes medical magic.
I was originally just an apprentice sewing corpses in the slums of Black Rock City. During a plague outbreak, I accidentally obtained an ancient code that could analyze diseases, potions, human structure and magic circuits. From then on, I was able to treat diseases, detoxify and improve potions with almost crushing efficiency.
As I continued to save people, slap the rich in the face, and crack down on extraordinary diseases, I discovered that the plagues that have swept across the world in recent years were not natural disasters, but someone who used the "Crown of Plague" pollution source in ancient ruins to create a controllable legion of disasters.
The Holy See wanted to kill me, the Mage Tower wanted to seize my code, and the nobles wanted to use me as a personal tool. But I decided to rely on my brains, medical skills, and increasingly exaggerated arcane strength to crush them all the way and seize the right to interpret the "life, death, and power" of this world.