Night hag
From Marillia
Night hags are a group of powerful supernatural entities who are poorly understood. They seem to be fiendish witches. They are the mightiest of the hags.
Yugoloths
Some believe it was a group of powerful night hags who created the General of Gehenna and the first yugoloths.
Eberron
In Eberron, the NHs are very high-ranking fiends spawned from Khyber.
