Protectors of Thought

When telling mages and magical tinkers no doesn't stop them, the Protectors of Thought are called in. Practically indistinguishable from an everyday citizen, these incredibly dangerous individuals stalk the streets looking for magic. Once they find it, they have total discretion on how to proceed with the offense. Either breaking down doors, subduing proprietors of magic, and erasing their minds, or sneaking in under the cover of darkness as not to cause a scene. The Protectors of Thought are not to be trifled with, and if you run afoul of their interests, you better prepare for war.