MTL - Magnate Uncle: Starting from Supermarket Shopping with Ten Nephews - Chapter 387 expert identification

Kyle woke up in a land of fantasy and magitech. The usual 'I died and woke up' bullshit, skip all that.

Except he used to be a crime lord, and society here is missing that extra kick.

After a cruel betrayal in the hands of people he thought he could trust, Ethan Carter lost everything—his idea, his future, even his life.But when he wakes up fifteen years in the past, he realizes fate has given him a second chance!And this time, he’s not alone.[Ding!][OmniTech System Activated!]With a system guiding him and access to groundbreaking technology decades ahead of its time, Ethan was about to rewrite history!Supercomputers? AI? Quantum processors? Bioengineering? The system provided blueprints to all.Now, armed with the knowledge of the future, Ethan will rise as a tech industry giant, crush his enemies, and build an empire that no one can overthrow!Wealth, power, and revenge—this time, he’s taking it all!

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