Balor are winged humanoid infernals who stand between 10 to 14 feet tall and weigh roughly 450 pounds. Their skin is generally black, veined with dark red, and they may be shroud themselves in flame at will; these flames inflicts 2d6 points of damage to anyone who touches them, or who is touched by them.

Balors are usually armed with huge jagged-edged swords doing 1d12+1 points of damage and whips made of red-hot twisted barbed wire which inflict 2d6 points of damage and entangle creatures struck by them. Entangled creatures must make a saving throw vs. Death Ray to escape, and any entangled creature of ogre-size or smaller may be pulled in by the balor. A balor may attack with only one of its weapons, but if the whip is used the balor will also immolate itself (as described above), thus inflicting additional damage to entangled creatures. As they are otherworldly creatures, a balor cannot be harmed by non-magical weapons.