Turbine's official Dungeons & Dragons Online website has been updated with a seventh monster profile, this time detailing the Hell Hound. Once again, concept art of the creature is included, but you'll need to be a member of the game's forums to view the article. Here's a bit to whet your appetite:
The typical specimen of canis infernis stands over 4 feet tall at the shoulder and weighs more than the typical elf male. As a creature summoned forth from a lower plane typically Fernia, the Sea of Fire the hell hound has immunity to a host of spells and effects that would otherwise effect animals or other creatures of the world of Eberron. More important to the fighter, though, are the hell hound's sharp teeth and fiery breath. This fiery breath strikes at the hell hound's victim with every bite attack, fully doubling the damage suffered. More threatening, the hell hound can breath out a cone of fire not unlike that of a small drake or dragon. Hence protection from fire is of paramount importance when dealing with these four-legged combatants. Without their fire attacks, the challenge posed by a hell hound is reduced to little more than that a trained attack dog.