The most evil-tempered and vile of the chromatic dragons, black dragons collect the wreckage and treasures of fallen peoples. These dragons loathe seeing the weak prosper and revel in the collapse of humanoid kingdoms. They make their homes in fetid swamps and crumbling ruins where kingdoms once stood.

With deep-socketed eyes and broad nasal openings, a black dragon's face resembles a skull. Its curving, segmented horns are bone-colored near the base and darken to dead black at the tips. As a black dragon ages, the flesh around its horns and cheekbones deteriorates as though eaten by acid, leaving thin layers of hide that enhance its skeletal appearance. A black dragon's head is marked by spikes and horns. Its tongue is flat with a forked tip, drooling slime whose acidic scent adds to the dragon's reek of rotting vegetation and foul water.

When it hatches, a black dragon has glossy black scale. As it ages, its scales become thicker and duller, helping it blend in to the marshes and blasted ruins that are its home.