Ihoujin, Dungeon ni Moguru - Chapter 155: Magic Mirror I

A Di [legitimate-born] daughter of a noble house turns into an abandoned daughter. No father to dote on her, no mother to love her, no problem. She uses one silver needle to save a dying man. What’s so unusual about a medical injection? She roams all over the world with a scalpel in her hand. Cutting throats, cutting open abdomens, cutting open skulls to mend bones. With amazing medical skills and ethics, she gathers a flock of officials, obtains the will of heavens, gains public favor, and receives Taizi’s [Crown Prince] doting. In the midst of a powerful momentum, her cheap father comes to reunite. She coldly refuses to go home or acknowledge ancestors.

Traveling through the world of One Piece, Ron, who became Kuina’s fiancé, awakened the god-level theft system.

In order to become stronger and change the fate of Kuina’s death, and to survive in this dangerous era of great pirates, Ron started to steal Sauron’s top kendo talent.

And that’s just the beginning.

In order to become stronger, Ron embarked on a journey to steal the talents of the world’s strongest.

“Ding! Congratulations to the host for stealing Karp’s physical talent!”

“Ding! Congratulations to the host for stealing Nika’s talent!”

“Ding! Congratulations to the host for stealing Shanks’ domineering talent!”

“Ding! Congratulations to the host…”

- Description from novelbuddy

After a tragic accident, an ordinary young man awakens in a new world teeming with floating islands, supernatural abilities, and mysterious dangers. Reincarnated in a body he doesn’t recognize and granted a cryptic “system” that refuses to explain itself, he’s thrust into Vanguard Academy—a high school where only the most powerful and determined survive.With no clue why he’s been chosen or what the system wants from him, he must navigate a cutthroat world of rivalries, alliances, and mind-bending challenges. Armed with courage, wit, and untapped potential, he embarks on a journey to uncover the truth behind his reincarnation and the forces pulling the strings in this enigmatic universe.Can he rise above the chaos, or will he fall like countless others before him?Perfect for fans of Solo Leveling and The Beginning After The End, this story blends reincarnation, epic battles, and intricate worldbuilding into a gripping tale of survival and self-discovery.

Crossing to One Piece world, he became Roger’s younger brother.

Unexpectedly, Gol-D-Roger who was in his fifties had a teenage brother. But he was so weak.

Fortunately, at the age of sixteen, he actually found himself with a possession soul system.

He had attached to the master IP man, also to the White Phoenix and to Ge Nie with his strong ability of the Hundred Step Flying Sword.

If you think that he can only Purchase these? Then you’re wrong!

Pain, Itachi, Ichigo Kurosaki, as long as there is money, any soul can be Purchased.

- Description from Novelupdates