A skilled thief gets a system in an Alternate Wizarding World. The system seems useless in the beginning since he hasn't unlocked any features. But...
[The very first feature of the System has been unlocked.]
[Congratulations. You've unlocked the class feature. Due to your existing skills and experience, you have gained the Special Class \

Su Xiao is a cold-blooded young adult who's seeking vengeance for the death of his family, yet things ended up badly for him.
As he was taking his last breaths, he heard a voice calling him from dimensions, it was a strange system reaching him, asking him if he wanted to be saved, to be Reincarnated.
He just needed to accept a contract, Su Xiao didn't have any choice but to do so, but he didn't know what he signed up for!!
Travelling through worlds, doing extremely dangerous missions, collecting special items, levelling up, and even killing Protagonists...
But Su Xiao wasn't any ordinary Contractor, Su Xiao was a Hunter!
The MC crosses over to: One Piece, Tokyo Ghoul, Naruto, Fullmetal Alchemist, Attack on Titans... and Author's Original Worlds...

Jin Runcandel is the youngest son of the greatest Swordmaster. After he gets himself kicked out of their clan, he meets a tragic fate...but before he dies, a God gives him a second chance. Now he must use his new power for good.
Will Jin become the world's strongest Swordmaster and live up to his greatest potential?

(Naruto World)
In the 56th year of the Konoha calendar, Akatsuki added two more members, one of whom was named Uchiha Itachi and the other named Uehara Naraku.
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(One Piece World)
That year, the Baroque Work recruited new employees, and the president, Warlord Crocodile, held a smoking pipe and looked at some resumes with satisfaction. One of the resumes was a young man smiling very kindly. He called Uehara Naraku.
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(Overlord World)
The Great Tomb of Nazarick.
The Ainz Ooal Gown guild members gather here, and they will carry out the last guild activity before the game closing service. Momonga looked at his friend and said in a deep voice, \