It has been mentioned elsewhere but apparently not here. Killing these lowers Army of Light faction and raises Silla Herald. Kill enough of them and you will need to wear the necklace just to run around their half of the forest, not just to get quests.
Huge thanks to Kildayil from Travelers of Norrath for showing me where these spawn. They spawn at the small 4 house section just west of Endell Faeronbeck's corpse.
I have no idea where these spawn, and have not seen any up. Anyone know where they spawn? Or how to spawn them? I have tried to clear "houses" of them repeatedly...with no luck of any spawning. Appreciate any help.