Life Siphon

Acquisition
Skill Quests: Skill Trainers: Signet of Capture:
 * The Necromancer's Novice (The Catacombs)
 * The Stolen Artifact (Sardelac Sanitarium)
 * Sir Bertran (Ascalon City)
 * Dakk (Ember Light Camp)
 * Chan the Dragon's Blood (The Undercity)

Note

 * This spell's positive effects stack with each other. Casting it on three different foes will result in three times the health regeneration for oneself.
 * Life Siphon ends prematurely if caster dies.