I'm Really Not the Leader of the Tantric Cult.

Noah woke up in the iron chair of the Holy Inquisition. Seven corpses sit around the old dyehouse, their shadows nailed to the ground. He was the only one who survived, lost his shadow, and got a black table that only he could see. The mages believed that the world was made of radiant matter, the church claimed that all things were born from the first light, and the nobles wrote both into laws for the purpose of taxation. This is a world where gods appear, dragons soar, and wizards rule towers. However, the Black Table told him: the so-called gods are just powerful beings within the world. The truly ancient beings are still sleeping beyond the stars. In order to recover his own shadow, Noah began to study forbidden books, conduct rituals, recruit followers, and establish a secret sect that never existed.