Stoning

Acquisition
Skill Quests: Skill Trainers: Hero Skill Trainers:
 * Skill Chaining (Elementalist Primary or Secondary) (Shing Jea Monastery - Factions)
 * Marna (Ice Tooth Cave)
 * Firstwatch Sergio (Lion's Arch)
 * Dakk (Ember Light Camp)
 * Warden of Whispers (The Kodash Bazaar)