Spell Sink

This device emanates an antimagic field (same effects as the antimagic field spell) in a radius of 1 to 3 miles. The field can be activated or deactivated as an action with a touch by its controller.

The form that the device takes depends on the nature of its creator. The Ashbound druids despise unnatural magic, so a spell sink created by them might be a living artifact, such as a twisted tree that consumes the magical energy around it. Conversely, a spell sink created by a mad artificer might be a massive vessel composed of dragonshards and exotic metals.

A variant device called the spell siphon not only neutralizes magic but also absorbs all magical energy in the area, storing that power for a cataclysmic effect.