Consume Shadows

Consume Shadows is a heal over time (and mana regeneration) spell that the Voidwalker casts on itself.

Talents
Improved Voidwalker is often considered one of the most essential demonology talents, prior to level 50 (or whenever you get your Felguard). The talent increases the health regenerated by 10% to 30%.

Tips and tactics
Considering how quickly pets regenerate health anyway, it's not often useful, although being Soul Linked to a Passive Voidwalker that is Consuming Shadows is one amazing scenario. However, if your Voidwalker has taken a particularly rough beating after a battle (which will be the case more often than not), this ability can help reduce downtime tremendously.