Life Siphon

Description
For 12...23 seconds, target suffers Health degeneration of 1...3, and you gain Health regeneration of 1...3.

Acquisition

 * The Catacombs: Quest, The Necromancer's Novice
 * Sardelac Sanitarium: Quest, The Stolen Artifact
 * Perdition Rock: Capture, Ignis Effigia

Note
This spell's positive effects stack with each other. Casting it on 3 different foes will result in 3 times the health regeneration for oneself. Blood magic at 4 gives a degen/regen of 2/2, and 12 blood magic is needed for degen/regen 3/3. It is believed 4/4 is impossible.