Starting with Mars, I Will Become the Eternal Immortal Emperor

[Mortal flow, no system, fantasy, decisive killing, not brainless] A young man took a spaceship to Mars, which was originally a way of adventure. Unexpectedly, he accidentally bumped into a mysterious ghost and was exposed to the path of immortality. Many years later, the young man entered the immortal world and accidentally learned that he was the reincarnation of the Immortal King. It turns out that in his previous life, he was a giant Immortal King and was going through endless reincarnations...