The Omen Crows.  Of the Service Clans the Omen Crows are creatures of luck, misfortune, and brokers between the First Sons and the more malicious Gods.  

The Omen Crows feed off misfortune and heal rapidly when in places of luck and chance such as gambling dens. Crows can sense the outcome of any roll of a dice, spin of the wheel, or anything solely based on luck or chance. Omen Crows can take the form of and command crows. Omen Crows can manipulate Luck and are known to broker deals between the First Sons and gods like Mire, Daltmot, and Sultria.  

The Omen Crows decay when not holding a lucky trinket, when sired something on their person becomes one. Mercury burns like acid when touching an Omen Crow. When losing a bet Omen Crows seem to develop a sense of friendship towards the victor.