Four hundred years later, a Celestial descends from the mountains. Born with a pair of purple-gold eyes, he can gaze across the land and behold the vast sea. The sages of the Three Teachings and the Martial Gods of the mortal world may be mighty, but I alone am free of worry, roaming the land at ease.
Slow burn + pseudo-invincible + no System + no heroine
(Inspiration came from Gao Shulu in Sword Snow Stride. The setting is borrowed, but the story is original.)