Why Is the Ace of Spades So Powerful and How to Use ItAce for ♠ symbolizes authority in a deck of cards. It is considered a card of mystery, might, and perception. The Knave for ♠ can also mean a person of dark complexion or a person that is talented in a particular field. This symbol commonly carries an air of being mystery and might suggest a need to trust gut feelings when dealing with a particular scenario.