Living Fortresses are Arcadian war machines created to protect the kingdom of Arcadia from Mesmeroth's army of Direfolk. But the sacred emblems that gave the machines purpose were cursed by Triloth. They now chase after the ancestors of the original pilots who controlled them. They are impervious to normal weapons, and they posses great destructive power. The three are Oceanhorn, Sealork, and Everturso. Oceanhorn being the only survivor.