The Descent: Journeys in the Dark (Second Edition) Wiki
No Cost to Purchase
Exhaust this card during your turn to choose two monsters. One monster suffers 2 Heart and the other monster recovers 1 Heart. If both monsters have the Dark monster trait, the monster suffering Heart suffers 1 fewer Heart.
Endless Thirst 0 Threat

Bloodline is the base Plot Card from Lady Eliza Farrow's Endless Thirst Lieutenant Pack. There is no cost for purchasing, and no cost for activating its ability.