- Main article: Faction Champions
Harkzog is a Horde warlock and is one of the possible opponents for Alliance in the Faction Champions battle in the Trial of the Crusader raid instance, together with his pet Zhaagrym.
- [Fear]: Strikes fear in the enemy, causing it to run in fear for up to 10 seconds. Damage caused may interrupt the effect. Only 1 target can be feared at a time.
- [Corruption]: Corrupts the target, causing Shadow damage over 18 seconds.
- [Unstable Affliction]: Shadow energy slowly destroys the target, causing damage over 15 seconds. In addition, if the Unstable Affliction is dispelled it will cause damage to the dispeller and silence them for 5 seconds.
- Curse of Agony: Curses the target with agony, causing Shadow damage over 24 seconds. This damage is dealt slowly at first, and builds up as the Curse reaches its full duration.
- [Curse of Exhaustion]: Reduces the target's movement speed by 50% for 12 seconds.
- [Hellfire]: Ignites the area surrounding the caster, causing Fire damage to herself and Fire damage to all nearby enemies every 1 sec. Lasts 15 seconds.
- [Searing Pain]: Inflict searing pain on the enemy target, causing Fire damage.
- [Shadow Bolt]: Sends a shadowy bolt at the enemy, causing Shadow damage.