Card sounds may differ from in-game as they get updated.
Unblockable - Cannot be blocked.
Nightfall - The first Nightfall card played in a turn makes it Night and extends it by a turn for each player.
Night - When you start a turn at Night, draw an additional card and take 1 damage.
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.