Side Job: SSS-Class Necromancer! - Chapter 31: [Just another Coincidence!]

What are you going to do when you pass through another world?

Yalin(MC): Perhaps, many of those seniors who passed through another world would like to use violence to solve their problems, but I like to control the fate of a country with economics and races with faith, I use benefits to instigate others so that I profit, and even making them take risk for me without them even knowing. In each country the highest is the king and behind the king is a string that is attach to my hand, for I am their puppeteer.

Yalin(MC): Certainly the credit does not only belong to me, I must give my thanks to the great knights and their leader Zero(Code Geass). The supreme master of blood, the moon princess(Tsukihime), the black and white princess, and also my ‘good friend’ called by his title the ‘God’s left eye’, president of the neutral autonomous city. Finally I must give thanks to my loyal and competent subordinates!

- Description from Novelupdates

Ten years ago, Joseph Cassian was thrown into a maximum-security prison for crimes he didn’t commit framed by the very family whose blood runs through his veins.Now, at twenty-eight, he walks free into a world where the city’s mafia empires have mysteriously crumbled. Their leaders, slaughtered. Their empires, burned.All while Joseph sat in silence behind bars... no one can prove he did anything and yet it all happened as if he planned it.Was he just a wrongfully imprisoned scapegoat, a man who survived injustice?Or is he a mastermind a Don who orchestrated revenge so flawlessly that not even he had to lift a finger?Now that he’s free, Joseph stands at a crossroads.He can leave the blood behind, walk away from the ashes of an empire that once owned the city.Or he can claim what’s left of his legacy and become the very Don the world has feared all along.

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?