Hakkari Witch Doctors are found inside the lvl 60+ raid-instance of Zul'Gurub. Hakkari Witch Doctors have an ability to polymorph a target into a frog (Hex). Hexxed targets can still be attacked and will not break the Hex. If a Witch Doctor is part of a group with a Gurubashi Blood Drinker, the Witch Doctor can be mind controlled and Hex the Blood Drinker, neutralizing the AoE life drain and making the Blood Drinker easy to kill.