Captis Oculus

Description
A ornate wood box with a mechanical cylinder on it's front, it bears a primitive resemblance to what we know as a camera. The front of the cylinder can open in order to snap an image of the current state of the world in front of it. The result on magic however is catastrophic, as magic runs on uncertainty and the possibility of anything being possible.

Game Rules
As a reaction, the wielder can snap a photograph of a 120 foot cone of view. Any magic being cast in that cone is nullified immediately, the spell being cast is lost and the spell slot spent. Any ongoing magical effects in that cone end immediately.