Play a copy of a unit.
Tribute: Play two copies instead.
Card sounds may differ from in-game as they get updated.
Warp - You can see cards with Warp when they are on top of your deck, and you can play them as if they were in your hand.
Tribute - Cards with Tribute have an additional effect when played if a unit went to your void this turn. This includes units that die or units you discard from your hand and deck.