Immortality: I Became a Legend to Others

(No System, mortal protagonist, morally ambiguous, multiple female leads. If that's not your thing, don't read.)

The young man Li Yi was accidentally swept up in a cosmic war, where he witnessed the Stone Ancestor battling the uncanny.

He died in an accident, then transmigrated to a world of immortals and martial heroes, carrying the Stone Ancestor's primordial spirit and the fruit of eternal life with him.

From then on, he was immortal, sometimes bold and conspicuous, sometimes keeping a low profile.

Step by step, he ultimately became a legend, eternally invincible in the eyes of others.