Fantasy: Invincible From the Immortal Emperor

Novel Summary
The vast wilderness is filled with thousands of ethnic groups. A generation of immortal emperors reborn, with the body of a mortal, surpassing the immortals.
I don’t want to be invincible, but I’m going further and further on the road of invincibility.
He just wanted to play in the world, but inadvertently, his best friend and classmate climbed to the top of the world and looked down on all beings.
– Description from readMTL