Cultist's Fervor

Description
For 5..17 seconds, your spells cost -7 Energy to cast, but you sacrifice 30..18 Health each time you cast a Spell.

Acquisition
Signet of Capture:
 * Cultist Rajazan (Unwaking Waters)
 * Kyril Oathwarden (Morostav Trail)
 * Cultist Milthuran (Rhea's Crater)