Dragon God's Legacy: Rise of the Forgotten Extra

Marcus Harwell, a successful businessman who achieved everything he dreamed of, dies unexpectedly and awakens in the body of an unnamed background character in "Chronicles of the Sacred Realm" - a fantasy novel he read years ago. Unlike typical transmigration stories, he doesn't become a main character or even a named side character, but rather a forgotten extra who was never even mentioned in the original story. However, fate has different plans. Marcus discovers he possesses dormant dragon bloodline - something that should be impossible, as dragons were thought extinct for millennia. When the ancient Dragon God Vaelthorne awakens from his eternal slumber, he chooses Marcus as his successor, granting him access to supreme draconic power that even the novel's original protagonist never possessed.