The cursed unit is stunned at Night.
Card sounds may differ from in-game as they get updated.
Summon - Does something when played
Stun - Exhaust a unit. It can't attack or block next turn.
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.