Huntmaster

From publisher blurb: Huntmaster and his pack of Warhounds are a mystery. They strike without warning and seem to care only for "the hunt." Someitmes he's after the bounty on his target's head, other times he's simply interested in a challenge. He's appeared in locations around the world and apparently comes from outside our reality, which explains his impressive armor and car-sized Warhounds! What will your heroes do when Huntmaster sets his sight on them?