Killer Bunnies Nu Series Promo card available in the specially packaged Killer Bunnies Quest Blue Starter Deck and the Killer Bunnies games for Go! Games. The Scarlet Letter Nu 08: May be used once to force any opponent to discard all cards in his five-card hand that contain the letter 'A' in the title or that have a Red button in the upper left corner (RUN cards). The player decides which option to use. The opponent must show his hand to the player to confirm that he has complied.