This Gadget works in either type of Chrononauts deck. Text says: "If you have this Gadget on the table, you may play an extra Inverter or Patch, and draw to replace it, after your normal turn action. You may only use one Time Machine action per turn." It debuted as a promo card at Origins 2004, and was added to the original game during the 3rd printing. It was also available for purchase by itself from the Looney Labs webstore