Worf, Defiant Commander is a mythic Legendary Creature — Klingon Warrior Officer card from Star Trek Commander (TRC), collector number 4.
When Worf enters, create a 2/1 red Klingon Warrior creature token with haste. Battlefront — Whenever you attack, exile the top X cards of your library, where X is the number of opponents you attacked this turn. Until the end of your next turn, you may play those cards.