My System's Magic Costs A Pound Of Flesh

Game designer Lin Xiuge died the day his magnum opus, Age of Black Sun, launched. He woke up immediately, not in heaven, but inside his own game world — 100 years before the main plot. Worse, he’s Sugar Ernst, a background character he doomed to become a mass-murdering pervert, whose head ends up on a statue. But a mysterious 'system' from his afterlife followed him, offering power for a price. His first \"magic inscription\" gave him horrific, tentacled abilities, activated by soul-shattering pain. Now, with Salem City marching towards the apocalypse he designed for it, and the ominous \"Black Sun\" prophecy looming, Ernst must master his agonizing Eldritch magic and rewrite his tragic future before the world he built consumes him whole.