Index -> Playing the Game -> Planning Phase -> Ditching Cards
Each planning phase, you may choose to "ditch" one card you no longer want in your hand to the Black Hole. To do this, click on the card and drag it from the Hand Area to the Black Hole.
Each time you do this, the card will be replaced with a new one during the draw phase, though you may incur a penalty for doing so.
Both players may view the contents of the Black Hole at any time. Double-clicking on the Black Hole reveals a window showing all the cards that have been ditched to the Black Hole. You can mouse-over a given card in the Black Hole to see who owns it. To close this window, click the "x" in the upper-right corner.