The Guild of Crows
Shrouded in secrecy and guile the Guild of Crows has been responsible for 8 out of every 10 assassinations in Tobyrna for the last hundred years.
Any job requiring ruthlessness and cunning is a job for an Agent of the Crows. Assassination, of course, thievery (but only if the target is seen as a challenge), political double-dealing, etc.
That’s not to say that there aren’t distinct advantages to Crow membership. They take care of their own.