The curse huntsmen

A boy who made a deal with the queen of Grimm to revive his foster father, but something went wrong he was turned into a Grimm and cursed the boy for what he have done, he cut down the boy left eye giving it a curse, the boy was in tears in the ground as his foster father grabbed hold of of the boy neck, finishing him off, when suddenly the boy semblance suddenly activated reflected the attack and killing his foster father for good.

The boy was heart broken as to what he have done, to his foster father.