The nuckelavee steals the luck of a creature it can see within 120 feet. The creature must succeed on a DC 18 Wisdom saving throw or it is cursed with bad luck. For as long as it remains cursed, attack rolls against the creature are made with advantage and the target has disadvantage on attack rolls to hit the nuckelavee. The curse ends when the nuckelavee ends the effect or dies or when the target receives a remove curse spell.