See power as it is used
All beings with heavy supernatural energies flowing through them are bound to them, able to see them in ways most humans and mundane creatures can't. You can see those that target your powerful aura, and it shoots back into theirs, tangling them in your grasp, granted they stay in reach. While tangled this way, you can see the forces radiating from them, and them you, until either break the grasp by escaping range. You may even occasionally pick up magics not targeting yourself if your senses are keen enough. Though, it is unrefined, and requires something to concentrate the abilities...
Spend an Action and Exert your Mind to activate this Power for one minute. While this Power is active, all Beings using supernatural abilities within 50 feet are detected, including those who enter its range after activation and those behind walls. You get a rough sense of how many, but not exact number.
Triggering Event - When being targeted with a supernatural ability