Obsidian Flame

Acquisition
Skill Quests: Skill Trainers will teach this skill even if it has not been unlocked:
 * Ghostly Vengeance (Augury Rock)
 * Bartoch (Droknar's Forge)
 * Dakk (Ember Light Camp)

Hero Skill Trainers:
 * Godaj (Lair of the Forgotten)