Li Yue travels to the devil's castle. It's not a cool vampire or a mysterious magician, but a bald brain? Fortunately, the brain has mind perception, teleportation, and soul impact...at least it counts. The above is a magical creature. Li Yue, who has unlocked the demon illustrated book, will start from a brain, collect strange monsters, transform inner demons, summon alien gods and monsters... Wander in chaos and darkness, and climb to the top of the Demon King City step by step.