Monster Paradise Novel

Eight centuries ago, the world was irrevocably altered when three thousand dimensional gates materialized globally. From these rifts, monstrous entities surged forth like a deluge, each gate resembling an eye opening to unleash its horde. These creatures posed varied threats: some, colossal in size, could demolish city fortifications with a single blow and preyed directly on humans. Others attached themselves to people, draining their life force and enslaving them. A more insidious group infiltrated human settlements, concealing their monstrous nature behind a human guise while subsisting on stolen blood. Overnight, humanity plummeted to the bottom of the established food chain. The world transformed, becoming a sanctuary, a veritable paradise, for these monsters.