Unmask

When a creature you can see within range uses a power granted by one of your masks, you may end the mask’s granted effect after the triggering use resolves. If the mask is being worn by an unwilling creature, it must make a WIS save; on a failed save, the mask falls off.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.