From their website:
The druids of the Circle Orboros have continued to experiment with the forbidden processes by which they transform men into the terrifying warpwolves. Volunteers chosen for the keenness of their minds as well as their strength in battle are candidates for the altered rites that produce the warpwolf stalker. Unlike their totally animalistic kin, the stalkers retain a more than animal cunning. They prowl the dense foliage of the Immoren forests, stalking their unsuspecting prey before leaping out to deliver powerful killing blows in a berserk frenzy.