Rank 1: Increases the amount drained by your Drain Life and Drain Soul spells by an additional 3% for each of your Affliction effects on the target, up to a maximum of 9% additional effect.

Rank 2: Increases the amount drained by your Drain Life and Drain Soul spells by an additional 6% for each of your Affliction effects on the target, up to a maximum of 18% additional effect.