In the Plane of Fear: A personal guard of Cazic Thule. He can Death Touch.
In Fear Itself: Slowable. Fright has two known PHs: The first is the amygdalan that stands at the base of the ramp of the temple within the Ring of Fire. The second PH is at the top of the temple by Tiseth the Thrall, looking out towards Fear (right hand side).
In Fear Itself (raid): Part of the "Cazic's Final Stand" raid event (see this quest entry for event and loot information).