When you end a turn at Night, transform each other unit you played this turn into a random unit that costs 1 more.
Card sounds may differ from in-game as they get updated.
Summon - Does something when played
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.