Tier 6 (Hero Level 16)
After using Life Tap, the next ability you cast has 25% increased Ability Power.
Patch changes[]
(Patch August 24, 2016) Note: Damage bonus increased from 20 to 25%.
(Patch August 9, 2016) Note: Bonus Ability Power granted through the Darkness Within Talent will now correctly apply to all ticks of Drain Life Healing.