[quote=TheRider]
Just gunna say, and sorry to shit on your character man, but Orcs aren't native to Ravnica and are almost exclusively Red aligned...and thematically the Orzhov wouldn't have an assassin. They deal with money, not blood. Sorry. I'm just a huge MTG lore nerd.
[/quote]

I just realized that the card I totally jacked this art from is an ogre and not an orc. I will fix that. 

Also there are examples of the Orzhov sending out hits on people's heads. Cards like Slum Reaper demonstrate this. And even if he isn't hired by the orzhov itself, I'm sure you could reasonably expect some kingpin to have grudges and a lot of disposable income.