System's Feeder: If I Don't Obey, It Devours Me

[You Have a New Quota!] Hello, Servant.  It's time to feed your Lord.  You understand, don't you? Blood Quota — 0/????? ml  Time Remaining: 04:00:00 [WARNING] If the required quota is not met, the automatic consumption protocol will activate.  The System is hungry.To feed itself, it will devour a random part of your body. --- When rifts tore open between Earth and the Underworld, humanity found salvation in the Sentinels—warriors bonded to magical rings, gifted with the power to fight back the endless tide of monsters. Blake should have been one of the greatest. Born into a legendary bloodline. Raised in privilege. Expected to inherit a legacy of power. But Blake has a problem. He can't use magic. And worse—he's terrified. Of monsters. Of pain. Of the very combat that defines what it means to survive. When his father delivers an ultimatum that will exile him from everything he's ever known, Blake is forced into a final exam he has no hope of passing. Then the monsters come. His team dies. And in his final moments, as something monstrous devours him whole, a crimson window appears in the darkness: [Do you accept the Blood Pact?] Now, Blake is no longer human. He is a Servant—bound to an ancient entity that feeds on blood and cares nothing for his survival. Every few days, a quota appears. Every quota demands thousands of milliliters of blood. If he fails to deliver, the System doesn't negotiate. It takes payment from his own body. Piece by piece. While the world celebrates Sentinels as humanity's protectors, Blake must become something else entirely—a hunter in the shadows, stealing blood to survive another day. In a world where heroes fight monsters to save lives… Blake must kill them to keep his own. --- How much of yourself would you sacrifice to survive?How far would you go when failure means losing everything—one piece at a time?