Brain of the Demon City

Li Yue travels to the demon king's castle, but instead of a cool vampire or a mysterious mage, he becomes a bald brain spirit?

Fortunately, a brain spirit has mental perception, telekinesis, and soul shock... at least it counts as a magical creature.

Unlocking the "demon illustrated handbook," Li Yue will begin as a brain spirit, collecting bizarre monsters, transforming inner demons, summoning strange beings from other worlds... wandering between chaos and darkness, step by step climbing to the top of the demon king's castle.