Omega Cards are promotional cards distributed at conventions, bunny promotions and special bunny events. Some cards are distributed when you buy your game through Playroom Entertainment or from select retailers. This card is considered promotional card for Killer Bunnies and the Conquest of the Magic Carrot. Omega Thirteen Omega 13: May be used once by a player to force any one die roll by any player to be re-rolled. May be used at any time!