The Demon Alchemist of the Steampunk World

In 1688, Holden.

Towering chimneys belched clouds of smoke. Steam leaked from the seams of machinery and filled the streets, while steel and gears rumbled like thunder. Shadows lurking in the corners began to stir.

Kane transmigrated into the body of a starving detective. Marked by the sigil of death, he was forced to swallow the remains of a demon to stay alive, gaining the supernatural ability to control flesh and blood. He then knocked on alchemy's hidden door, using his own flesh and blood as a foundation to bring forth an endless array of bizarre miracles.

Thus a demon alchemist who wielded fire and blood descended upon the world.