Affliction

Warlocks are the eternal masters of shadow magic, a practice perfected over many generations. While they excel in the manipulalation of demons, their true power lies in their own hands.

Affliction is a Warlock talent tree that includes curses and DoT spells, as well as various other debuffs. The Affliction tree relies on slow, steady death while being mana efficient. With abilities such as Haunt, a warlock with talents deep in this tree is fit to survive a long, drawn out battle based on the ability to regenerate large amounts of health to offset Lifetap usage. Also, the Affliction tree contains one of the two talented snare ability that warlocks are capable of getting, Curse of Exhaustion (the other being the daze affect from Conflagrate via Aftermath in Destruction).