Lord of the Mysteries by Cuttlefish That Loves Diving

This acclaimed Chinese web novel follows Zhou Mingrui, a ordinary man who mysteriously transmigrates into the body of Klein Moretti, a history graduate student in a world reminiscent of a Victorian-era alternate reality . This world is a fascinating fusion of steampunk technology, gas lamps, airships, and a hidden, terrifying layer of Lovecraftian horror where ancient gods and cosmic entities lurk in the shadows .

To survive and find a way home, Klein must navigate the dangerous world of "Beyonders"—individuals who gain extraordinary powers by drinking mystical potions . He begins his journey as a lowly "Nighthawk," a kind of supernatural investigator for a secret church organization . After stumbling upon a mysterious ritual, he inadvertently connects with others in a mysterious space, forcing him to masquerade as a powerful, ancient being he calls "The Fool" and founds the secretive Tarot Club .

As he unravels the mysteries surrounding his new body's death and the occult underbelly of society, Klein slowly climbs the ladder of a complex 22-pathway power system. His quest transforms from a simple search for a way back home into a perilous journey to uncover cosmic truths, face ancient conspiracies, and ultimately challenge the very nature of reality itself in his ascension to become a true lord of mysteries