Summon: You may choose a card from your hand to swap with a or card in your Market.
Card sounds may differ from in-game as they get updated.
Ambush - An ambush unit can be played at the end of the enemy player's turn, or any time they are attacking you. If you played against a Killer or Relic Weapon attack, an Ambush unit will jump in the way to block that attack.
Summon - Does something when played
Market - You can store up to five unique cards in your market that are not in your main deck when you build your deck. Your market is hidden from the enemy player.