Discard is a keyword that forces the target player to place a card out of play into the discard pile. All Call to Arms cards that involve discarding do so as a cost for play, as opposed to an effect directed at your opponent.
Currently there are no means of defense against discard, nor any ways of retrieving cards from the discard pile once lost.
Cards with Discard
|Coup de Grace||Common|| Discard a random card. Condemn a hero.
|Keenfolk Golem||Rare||Play Effect: Discard your hand.|