The Life Siphon is one of the ten Artifacts in WRATH: Aeon of Ruin. It appears as a heart-shaped item, sealed in a shell of some sort and surrounded by a red halo-like ring.
The Life Siphon enables Outlander to drain lifeforce from the slain enemies. The amount of granted health varies on the vitality of the enemy in question: weak enemies like the Fallen give 5 HP, moderately tough ones like the Afflicted give 10 HP, and large enemies like the Heretic give 20 HP.
When active, the Life Siphon shrouds Outlander's vision in red veil. The life drain effect lasts for twenty seconds.