I'm Disguised as a Monster in the Demon King's Castle

Li Yue transmigrated to the Demon King's castle, not as a cool vampire nor a mysterious mage, but as a... bald brain spirit? Fortunately, the brain spirit has telepathic perception, can move objects from afar, and has soul impact... At least it can be considered a magical creature.Having unlocked the "Demon Compendium", Li Yue will start from a brain spirit, collecting strange monsters, transforming into demons within his heart, summoning gods and monsters from other worlds... wandering between chaos and darkness, step by step ascending to the top of the Demon King's castle.