In Forge Of Fury, Vak's room with Great Ulfa was invaded by Dwarven adventurers. As a result of their upbringing, they felt little love towards their owners, and were willing to turn against Great Ulfa when charmed by Morgran Frostbeard-Axethrower's Potion of Animal Friendship. After her death, and the further routing of the orcs on Khundrukar's upper floor, the wolves escaped the mountain and resumed life in the nearby woods.
A ferocious Dire Wolf born in the Forest of Stone Tooth, Vak was captured as a young pup and separated from his mother by a band of Orcs. The orcs killed the dire wolf pack and brought him to their base in the Stone Tooth. There, he was raised with his brother Thrag under the "care" of the Ogre chieftain Great Ulfa. They were starved and beaten regularly, and were trained to be hyper-aggressive towards intruders. Spending most of their lives in Khundrukar, they were taught to not leave the orc's abode, and to avoid Stirges at all costs.