La Fallera Calavera card is a promo that was given out separately with the very first purchases of the game when it was released. It consists of only one card that adds to your deck (forming a 25 card deck). If played as a fighter, La Fallera Calavera will "revive" any fighter that lost a duel (yours or from your opponent) and you will use that fighter for the duel, removing La Fallera Calavera from the game. If played as a star, you lose the duel inmediately, but on your next duel your fighter has +7 power.