With Unlimited Sanity, I Became an Ancient God

Jiang Yuan thought he was playing a Cthulhu-style role-playing game, only to discover that every change in the game directly affected reality. After maxing out his SAN and breaking through the limit, the character he created even gained an extra title suffix: [Old God]. That meant he had somehow become the enemy of all humanity, a harbinger of the apocalypse and the world's destruction. Just as Jiang Yuan was wondering whether he should destroy the world, he unexpectedly received an invitation to enroll at the Arcane University. The greatest enemy of humanity had become a student at the foremost academy for fighting the uncanny? Some say he is the brooding, dark hero who will tear apart the age of the uncanny, the prophesied savior known as “The One.” Others say he is the master of taboos, the god of the apocalypse, the Demon King who rules over demon kings. He is Alpha, and he is Omega. He doesn't deny any of that. But names like “older-woman hunter” and “male incubus” are absolutely just rumors. [Keywords: mastermind, secret identities, occult academy, a world with a bit of everything, multiple heroines]