Talk:Salem/@comment-226878-20160214180405/@comment-25110963-20160214183533

Ever heard of Spectrobes? The creatures of darkness, the Krawl are not an intelligent species, until a former Spectrobe Master, Krux, mutated by infusing himself with Krawl matter and can now control them.

I think this is a similar situation. Salem is a witch that mutated herself with Grimm. So she has a degree of control over them and gave some of it to Cinder via the glove.