Captive’s Collar

Wondrous item, uncommon

This rusted black iron collar comes with a silver control bracelet used by a captor. When the wearer of the collar moves 100 feet away from the control bracelet, they are stopped by an invisible wall. Other creatures may pass through the wall without incident. The wall is immune to all damage and can’t be dispelled by dispel magic. A disintegrate spell destroys the wall instantly, however. The wall also extends into the Ethereal Plane, blocking ethereal travel through the wall. The wielder of the control bracelet may use an action to increase or decrease the range of the invisible wall, up to a maximum of 1000 feet and a minimum of 10 feet.