The Descent: Journeys in the Dark (Second Edition) Wiki
No Cost to Purchase
Exhaust this card when a hero is defeated. Instead of gaining 1 threat token or drawing 1 Overlord card, you may place 1 threat token from the supply on 1 of that hero's Class cards that has a fatigue cost.

Each Class card with 1 or more threat tokens on it costs 1 additional fatigue to use. At the end of each quest return all threat tokens on Class cards to the supply.

Vital Essence 1/12 0 Threat