All-Seeing Eye

For the duration, you gain truesight out to 120 ft., can see invisible creatures and objects, automatically detect illusions, and may create a clairvoyant sensor at any location you have seen before on the same plane. As a bonus action, you may move your perception between your body and the sensor.

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