Oinoloth

The Oinoloth was the yugoloth lord of Khin-Oin.

Requirements
While a member of any race could theoretically become the Oinoloth, Khin-Oin's rulers were always of the yugoloth race. The requirements were to kill, not just drive away, the current Oinoloth and to sit on the Siege Malicious, a throne on the top of the Wasting Tower.

Abilities
The being who became the Oinoloth was disfigured by loss of their skin. But with the disfigurement came power over disease. An Oinoloth could create any new disease or modify existing ones as it wished. This process was so fast that coming up with a name for the disease could easily be the most time-consuming part of creation. Once created, the Oinoloth could securely infect anybody within 300 feet (91 meters) with the new disease.

Relationship
Khin-Oin's rulers were in a violent competition with each other over the position of the Oinoloth.

History
At the end of the Silence of Lolth, Vhaeraun struck a bargain with the ultroloth Inthracis: if Inthracis successfully killed the Yor'thae candidates, Vhaeraun would kill Kexxon, the Oinoloth at the time.