Dark Fog is a level 23 elite mob that is required for the Achievement - Rare Blood in Swamp of Wyrms.
He is located along the cliff below the Bordhill teleport, although he will walk through the swamp all the way to the southern road on the other end of the town.
He respawns every 3 hours.
Dark Fog drops level 19-23 uncommon equipment.
Noteworthy drops include:
|Master Sergeant's Symbol||Materials|
|Fragment of Lost Scroll||Quest item|
|Mysterious Spore||Quest item|
|Swamp Worm||Quest item|