In the Plane of Fear: Has an AE poison proc. Spawns from the corpse of the indifferent Enraged Imp.
In Fear Itself: Note: For all map points of nameds in Fear Itself (for "thuledream.txt" map files), see this quest entry. PHs are "an enraged scareling" on and around the big hill in the eastern part of the zone (known to spawn near Quest NPC Hildran Heartguard). It hits for a max ~11,000 and spawns adds called "Essence of Rage".