Mark of Subversion

Description
For (4...9) seconds, the next time target foe casts a Spell that targets an ally, the Spell fails and you steal up to (10...76) Health from that foe.

Acquisition
Skill Quests: Skill Trainers:
 * None
 * Marna (Ice Tooth Cave)
 * Firstwatch Sergio (Lion's Arch)
 * Dakk (Ember Light Camp)