Yeenoghu is the demon prince of gnolls, appearing as an extraordinarily large and ferocious specimen of that degenerate race. He maintains a personal realm within the Abyss, ruling with a cruel and unpredictable hand. He demands sacrifices of blood and pain from his followers, and encourages them to follow their bestial instincts into a frenzy of gore and death.
It was in Yeenoghu’s name that the gnolls of the Demonruck launched their assault against the Five Cities. In time, other malign forces joined the Demonruck, adding their strength and fervor to the blood-drenched worship of the hyena-headed demon prince.