Assassin's Coin

A coin that you have received in payment or an exchange becomes imbued with a magical charm. Once the spell is cast, return the coin to the creature who gave it to you. As an action, when they throw the coin into the air and speak your name or whatever name you provided, the coin vanishes and reappears in your pocket, along with a clear mental image of whoever spoke your name. No message can be transferred along with the coin.