Xuanhuan, corruption, a battle for supremacy, and a steady rise in power. An invincible lead who kills without hesitation, a good-for-nothing who makes a comeback, and a chance discovery: the Spirit-Demon Clan's supreme treasure, the Heaven and Earth Demon Ring. As the protagonist nears death, the remnant soul of a demon spirit appears inside the ring, and the two strike a deal. The spirit teaches him the Spirit-Demon Clan's supreme cultivation method, the God-Demon Art, and the indestructible demon body technique. Teacher and friend alike, the spirit helps him grow, and the protagonist will go to any lengths for it.
I think it's pretty good, I'll give it five stars first.