Conquering the Lower Realms

On an island in the forgotten seas, there lies a mansion. In truth it's a glorified prison for the strongest mages known to man. They were imprisoned after the ancient war that had taken place 500 years ago. But can they truly not leave? As the prisoners stop to remain as docile as they were before the world suddenly learns why those people were kept away from society. But the escaped prisoners have much grander plans and set their sight on the lower realms, a unique set of worlds below the surface. Author's note: If you find any mistakes in my writing feel free to point them out in the comments. I'm always trying to improve the quality of my writing and any help is much appreciated. I you want to chat or ask more specific questions about any of my books join my discord: https://discord.gg/aCcmyzw