Karen's request was not complicated; he hoped that Bartlett could help him exterminate a group of terrifying monsters that had overrun the forest from an unknown source. Fighting monsters was what the Barbarian did best, so, unsurprisingly, he accepted the task.
According to Karen, these monsters made up an entire community, around twenty or so "Soulless Evil Hounds". They were a dual-headed breed of wicked and brutal canines, typically native to the desert and sometimes below ground in the Dark Domain, but seldom entered forests.
Some argue that these two-headed Soulless Evil Hounds were cousins of Cerberus, the gatekeeper of Barto Nine Hells. They were thought to have been created after mages crossbred Cerberus with some canine species from the Prime Material Plane, making these hounds yet another aberration among countless magical creations—a result of some whimsical experiment by magic wielders.