Black Dragon

Black Dragons, also known as skull 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. 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. A black dragon grew up to a maximum size of 16 feet (4.9 meters) tall, 85 feet (26 meters) in length, with a wingspan of 80 feet (24 meters). They weighed up to 160,000 pounds (73,000 kilograms).
Personality Solitary and extremely territorial in their nature, black dragons would seldom form clans, opting to do so only when they lived in the most hazardous of environments or when faced with a danger that could wipe out large swaths of their population.
Combat Black dragons preferred ambushes to straightforward fighting.
Breath Weapon Black dragons breathed a stream of acid.
Lair Black dragons lived in swamps, jungles and fetid marshlands. They were cunning creatures who lived to inspire fear and rule by intimidation. The black, glossy scales of black dragons added to their camouflage within swamp lands. They preferred to ambush their targets, using darkness or water as their cover. They were excellent swimmers and often made their lairs in submerged caves or underground chambers near swamps or murky ponds. Their lairs always had two entrances: one underwater through the adjacent swamp or pond, and one above-ground, disguised amidst the undergrowth.