NameDeck of Many Things: Balance Card
TypeW
Magic itemYes
Raritylegendary
TextAs an action, you can brandish this card at one creature you can see within 30 feet of yourself and drain its life force. The target must succeed on a DC 17 Constitution saving throw or take 4d8 necrotic damage. You then regain a number of hit points equal to the necrotic damage the target takes. Once this property is used, it can't be used again until the next dawn. Source: The Book of Many Things p. 13