Abyssal ghoul

Abyssal ghouls were extraplanar undead creatures that served the drow goddess Kiaransalee.

Description
Appearing much like an ordinary ghoul with a twisted and bestial humanoid form, an abyssal ghoul differed in a few ways. It had hideously elongated fingers and toes that ended in wicked-looking claws. Dangling from its mouth was a tongue, roughly 1 ft (0.3 m) long, that trailed into incorporeal smoke. Its eyes were effectively blind.

Abilities
Very strong for its size and surprisingly agile, an abyssal ghoul could overpower most foes with its savage attacks. Despite being blind they compensated more than adequately with their other senses.
 * Disease: The putrid nature of their front and rear claws was such that their attacks could leave a festering disease, known as demon fever, in their wake.
 * Deathwatch: Much like the spell of the same name, an abyssal ghoul was always aware how close to death creatures within 90 ft (27.4 m) of it were.
 * Sneak Attack: Abyssal ghouls were especially adept at striking foes when they were most vulnerable and could inflict great damage to those they caught unawares.
 * Uncanny Dodge: The reflexes of an abyssal ghoul were honed to such a degree that they were almost impossible to surprise or outflank.
 * Wisdom Drain: If an abyssal ghoul pinned an enemy, it could bring its smoky tongue to bear and drain the very sanity from a victim. Eventually it could reduce an enemy to a comatose state.

After the collapse of the Abyss into the Elemental Chaos, abyssal ghouls demonstrated some different abilities compared to before.
 * Dead Blood: Notably, if an abyssal ghoul was defeated it would explode in a shower of necrotic blood, potentially afflicting all those nearby.
 * Sepulchral Stench: Infused with the pungent aroma of the grave, enemies who got too close to an abyssal ghoul would struggle to defend themselves appropriately.

Psychology
Despite their bestial appearance, abyssal ghouls were possessed of a great deal of cunning. Most notably in battle, they would work together to out maneuver an opponent and pick their perfect moment to strike. Opportunistic combatants, they would sometimes lie in wait for just the right moment to pounce.

History
Abyssal ghouls were the servants of the drow deity of undeath, Kiaransalee, typically serving her whims. During the Silence of Lolth in 1372 DR, Irae T'sarran summoned numerous abyssal ghouls to the besieged city of Maerimydra, where they eagerly harassed the forces of Kurgoth Hellspawn.

Appearances

 * City of the Spider Queen
 * Fiend Folio
 * Monster Manual 4th edition