In the Plane of Fear: A personal guard of Cazic Thule. He does not death touch like the other two.
In Fear Itself (static): (no data)
In Fear Itself (group): Part of the "An Offering to Thule" group mission (see this quest entry for information).
In Fear Itself (raid): Part of the "Cazic's Final Stand" raid event (see this quest entry for event and loot information).