Blacksmith of the Apocalypse - 1415. Warriors’ Endless Stamina

The doomsday fell upon the earth when a dragon coffin sealed under a snow mountain for ages shifted, and the civilization of gods and devils began. The whole universe turned into a fantastic new world where everyone could rise to the top through cultivation. A lucky young boy seized the opportunity, and started his journey to be an overlord in cultivation.

- Description from Novelupdates

Ron finds himself reborn in the world of One Piece, stranded on a remote island in the East Blue. But he's not just any ordinary child—he’s bonded to a mysterious sign-in system that grants him powers with every new location he visits.At his first sign-in, he unlocks the legendary Sun Breathing Technique, along with a boost to his vitality. From Shitmotsuki Village to Skypiea, Enies Lobby to Marineford, Ron travels the world, collecting extraordinary rewards that make him a force to be reckoned with. The Raikiri, one of the 21 Great Grade Swords, Armament Haki, Observation Haki, and more fall into his hands.As Ron steps onto the battlefield of Marineford during the legendary Summit War, the mightiest warriors—Four Emperors and Marine Admirals alike—pause, stunned by his presence. But Ron merely waves them off, “Don’t mind me. I’m just passing through.”Join Ron on his journey across the Grand Line as he signs in at iconic locations, growing stronger with every step. This is not just an adventure—it’s a legend in the making.

Dusk is the boundary, Yin and Yang are divided into two parts.

When the evil god’s flesh and blood crowded out from the cracks in the earth, when mountains of flesh and blood appeared everywhere.

Some people fear it, some people worship it, and some people burn incense and make offerings.

Some people also tasted it, hey, it tastes good?

As a result, flesh and blood turned into crops, and people greedily harvested, fought for, and worshiped their ancestors.

Hu Ma was reincarnated from fear, ate Tai Sui, kept a stove, went through hardships, fought for his life against evil spirits everywhere, and then…

……What? Am I the evil one?

- Description from novelbuddy