Kamigoroshi no Eiyuu to Nanatsu no Seiyaku - Chapter 33 Yamada-kun and Utano-san

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Earth Immortals are cultivated from a blessed land.

Lin Chen transmigrates to the Dragon Ball world and unexpectedly awakens the Strongest selection system.“Defeat Frieza and prevent the destruction of Planet Vegeta. Reward: Legendary Saiyan bloodline.”“Choice 2: Defeat Supreme Kai. Reward: Supreme Kai’s powers..……