One Piece: From the Rocks Era to King of the World - Chapter 27 - One Month’s Progress

This is a world where humans, demons and mysterious beasts coexist.

Humans cultivate mysterious qi. Demons cultivate corporeal bodies. Mysterious beasts cultivate soul perception.

A legend says that in the middle of an endless rainforest, there are extremely powerful existences; they are called demon kings.

Some demon kings have a tyrannical corporeal body, some are experts in illusions.
Some demon kings are proficient in magic, some can even move mountains.
Some demon kings are able to sense things thousands of miles away.

These demon kings rarely appear in the human world. Even if they emerge in the human world, they would reincarnate in human form; assimilating with mankind while seeking to breakthrough realms…

- Description from Novelupdates

Ding![The Host has died!]A system message popped up in front of Nell's body after his last dying breath.Ding![Dark Evolution has been activated to absorb the death essence of the host.]And then he opened his eyes to find himself in the past right before the battle started.'Ah! Am I back to the past?'Ding![Please choose a partner to start the Dark Evolution process.][Partner Condition: Must be a living creature from the Monster category, not the Human category][Partner Gender has to be Female.]'Partner? A monster?'Nell's heart pounded in his chest, and he felt a cold sweat coming on.'A female monster?'

A new fantasy world built by Fang Xiang, please enter!

- Description from novelbuddy

After getting hit by a truck, Hayate Kurogami experienced something bizarre. He arrived in alternative world and awakened as Kaiju Maker.Unfortunately, he was forced to leave this world.Sacrificing himself for goods, Hayate reincarnated to another world.A cultivation world filled dangers and charming beauties.Watch our protagonist become stronger, adventuring the vast universes to achieve the highest realm.1st World: Against the Gods