Fel stalkers are the hunting hounds of the pit lords, starving both for blood and for arcane energy. The corner of the Twisting Nether that spawned them is a void, drained of magic and substance and filled with drifting corpses. Maggot fel stalkers embedded in the nearby planar substance mature, hunt, and often lay young before the pit lords rangers find them and train them. Fel stalkers have been observed with 2, 4, or 6 legs which indicates breed rather than power. Fel stalkers treat spellcasters, particularly arcane spellcasters, as layered desserts with meat on the outside and magic on the inside. Less magical characters are worth notice only if they have damaged the fel stalker in battle. Fel stalkers generally use their arcane vortex ability whenever in combat, unless instructed otherwise by their pit lord.

Fel stalkers tend to grow larger after feeding, they can also reproduce via mitosis after it has absorbed a sufficient amount of energy.

Fel stalkers are demon hounds used by the pit lords to sniff out sources of magic wherever they be found. Felhounds, who feed upon magic itself, using the two tentacles on its back, are fond of draining the energies of hapless wizards, turning them into dry husks. They then rip the remains to shreds.

Kind of sad to see so many of these guys charging after melee classes in BGs. If you're not sending it after casters, what's the point of having them out?

Yea, these guys murder Casters, and paladins, expecialy paladins...who's greatest weaknesses, the felhunter has...all of them!! from a devour magic to spell lock, the most HORRIBLE thing about these guys tho, is a warlock, destro or demo spec'ed, and doesnt use one of these things, is completely unable to silence, and dispel.......which i must say sucks