Becoming evil makes you ten times stronger, but becoming a demon gives you hundredfold strength - Chapter 539 - 392 Declaration of War

Once through the pirates, Lu En became the son of Monkey d Dragon, a grandfather named Monkey d Karp, and an unreliable and neurotic younger brother named Luffy.

Fortunately, the ghost back system is activated!

The completion of the ghost back is 10%, and the training effect is increased by 100 times!

The completion of the ghost back is 20%, and the training effect is increased by 1000 times!

…

One day, Lu En, a ghost-backed master, appeared in front of Luffy who was shouting to go to sea, and made Luffy cry on the spot.

Luffy: “The pirates in the sea are all monsters like my brother? I don’t want to go out to sea!”

Garp: “For a long time, the two boys, Long and Luffy, with small arms and calves, I really doubt that they are not my sons and grandsons. Like Lu En, they are the grandsons of the old man!”

Warring States: “The strongest creature in the sea, land and air is Kaido? No, it’s Lu En!”

- Description from novelbuddy

Born as the fifth son of a Duke, Rex Grimes. Though he was the youngest, he was the toughest contender to the first son of the Grimes, the hope of the Grimes also titled as once in a millennium genius.Will he be able to fight his way out. Maybe not.Facing an unfortunate accident in which he lost all of his cultivation. All his hopes and dreams were lost.{The train has arrived at Valmere Valley}Deciding to go back to his childhood warmth. Rest was the best cure but it seems that there was still a way for him.[Gacha Wheel][Insufficient points]'How do I gain points'[Please Get wives and practice the art of love and creation of life][Only Ying and Yang will give birth the to creation of points]

Xuanyuan was reborn into a strange new world where training to be a Xian was a cornerstone. There was however something ancient dwelling inside his body. He could now devour all of creation…

This is the journey of an ordinary boy and his transformation into the supreme being that reigns over all existence! Everywhere he went, he could not help but tie his fate with numerous women. It did not matter whether they were a goddess or a devil…

- Description from Novelupdates