Black dragons were far and away the most vile tempered and cruel of all chromatic dragons. They were solitary creatures that lived in the swamps and marshlands all around Toril, from the Flooded Forest in Sembia to the jungles of Chult.
Black dragons appeared abnormally slender in comparison to other chromatic dragons—wiry, but not gaunt. Physically, they were most distinguished by their horns, which protruded from the sides of their heads and wrapped around, projecting forward. A large frill adorned the upper part of the neck. They smelled like rotting vegetation and foul water.