Hellhounds are the intelligent fire wolves of Muspelheim. There, they are often kept by fire giants. They burn with an internal fire. When they attack, there is a 2 in 6 chance that instead of biting they will breathe fire for 5d6 damage. Save vs. spells for half. They are themselves immune to fire. Hellhounds make excellent guards for all sorts of evil overlords because they can see invisible.
HD 5 AC 4 1d6 or breathe fire F5 MV 12 ML 9 XP 650; immune to fire; see invisible
Numbers: 2d4. Hellhounds roam around in packs.
Names: Jaws, Teeth, Bite, Death, Night.