Rebirth: the Reincarnated Demon Lord

I thought I was the greatest master in the world, but I never expected to be betrayed by the person I protected at my peak moment. One person and one sword resisted the entire demon world, but when he looked back, he found that the fairy world standing under the eternal light was already in decay. The Great Dao grants me reincarnation, and I will never enter the Immortal Path in this life. No system, no harem, passion and friendship. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.