This is a named mob in the Dreadlands of Kunark. It is a rare Drolvarg and they are its place holders. The mob wanders and I have seen 2 at once, so it is only semi-rare. It drops the non-magic, lore whip "Yellow Whip" 7/33, melee and melee hyybrids only, all races - used in the Necromancer 8th Rank quest.
Submitted by Kharga Reaverhand, Cazic Thule