When you engage in an activity related to the supernatural or the occult for the first time, imagine what your actions would look like as a move. Say what triggers the move and roll with Sensitivity.
On a 10+, it works; work with the Keeper to write the move—it is now a move all Mavens can use for the rest of the game and your roll stands.
On a 7–9, you must also mark The Crown of the Void.
On a miss, it’s not something the Mavens can ever do and you also mark The Crown of the Void.
Note: The Keeper can require you to have a strong fictional justification for doing so before attempting to trigger this move.