Damn Heavenly Emperor, I'll Outlive You

[Dark fantasy] + [Original cultivation techniques and power system] + [Longevity] + [Human experimentation] + [No System] + [Slow burn]

Some call me the founder of the path to Longevity, the Serpent's devoted follower, the greatest beast tamer. But far more call me the great fiend, the greatest darkness since the dawn of time, the ultimate darkness.

Yet others sing my praises as the trailblazer of a new age, the vanquisher of darkness, and the vanguard who brought the Dark Age to an end.

Immortals

Since ancient times, the path to Longevity has been fraught with tribulation; only a few heroes remain.

A road of bones stretches through the ages, yet no heart that seeks eternal life can be found.

This is a dark world where people will stop at nothing in pursuit of eternal life.

Here, whether you are a ferocious beast, a demon, a witch, or a primeval royal who once flourished for an entire era, or even the current overlords of heaven and earth, humanity, all are merely food to prolong the lives of those who struggle to survive.

Some dance as they defy and punish the heavens, all for the sake of becoming an immortal.