My Vampire System Novel

Humanity faces extinction in a war against the vicious Dalki. In this desperate time, hidden individuals with extraordinary abilities emerge from centuries of secrecy. While some share their powers to aid humanity's struggle, others guard their abilities jealously. Quinn has suffered devastating losses—his home and family destroyed by war. His only inheritance is an ancient, sealed book that refuses to open. When the book finally unlocks, Quinn receives a system that transforms his existence entirely. Through relentless completion of quests, he grows progressively stronger. However, the system eventually presents Quinn with an impossible challenge. It demands he feed on human blood within twenty-four hours, threatening to drain his life force if he refuses. Quinn must now confront this terrifying requirement, unsure whether he can bring himself to complete it.