Cloaker lord

Cloaker lords were a larger and more powerful subrace of cloakers, and thus tended to lead their weaker cousins.

Description
A cloaker lord looked much like a regular cloaker, except much larger. They were bat-like creatures that bore a resemblance to massive black cloaks, approximately the size that a giant might wear. When unfurled, they revealed a white underside with red eyes and a mouth filled with sharp fangs. They could flap their bodies as wings, with each "wing" ending in sharp claws. They had muscular, whip-like tails with a sharp bony barb at the tip. Cloaker lords were capable of growing even larger, although some dwarven scholars beleieved that they did not age, and might somehow live outside the flow of time.

Abilities
A cloaker lord could emit an unearthly subsonic moan whenever it wished (assuming it did not have something in its mouth, of course). This moan had various negative effects on any creature that could hear it, ranging from being neauseated to being frightened or unnerved to being paralyzed. The cloaker lord could change the effect by changing the pitch and volume of its moan.

They futher possessed the innate ability to cast a wide range of spells, and could do so solely with verbal components. Their magical repitoire only expanded as they grew in size, and they largely specialized in illusion and shadow magic that increased their options for crippling enemies or increasing their mobility. On top of this, they had the innate power to manipulate shadows, and could plane shift to the Shadowfell once each day.

Cloaker lords had an innate power to dominate lesser cloakers to their will.

Personality
Backed by their innate powers of domination, cloaker lords ruled over other cloakers, and were the only force that could bring the aberrant creatures together. They were more aggressive than normal cloakers, but not reckless.

Cloaker lords were said to have minds so alien to most races that it was impossible to communicate with one. They were known to use their aberrant moans to hound their prey into submission, and to enslave any creature they did not wish to eat for the purposes of luring tastier victims or distracting more dangerous enemies.

Combat
A cloaker lord always began a battle with its eerie moan to cripple or scatter its foes. It then moved in to wrap its body around an individual enemy, engulfing the target to restict its movement and then tearing at the trapped victim with its fangs while fending off other enemies with its barbed tail. When faced with many enemies, a cloaker lord preferred to target wizards first.

They could use their ability to manipulate shadows to obscure their enemies' vision, create distracting illusions, and conjure mirror images of themselves.

Society
Cloaker lords were found either underground, commonly in the Underdark, or in the Shadowfell. They would occasionally draw their weaker cousins together to form cloaker cities, such as Rringlor Noroth beneath Calimshan. These cities could exist in perfect status quo for millenia under the watchful rule of one or more cloaker lords. Multiple lords would occasionally merge their bodies to form a living sphere of shadowstuff known as a "Conclave of Shadows", which allowed them to share their thoughts and make decisions. Once a Conclave ended and the cloaker lords returned to their original bodies, they did so with a concensus about what needed to be done, and they went forth to act on their decisions.

Rumors & Legends
Some scholars believed that cloaker lords were simply very ancient cloakers.