Furies

The Furies were an ancient society made up of 666 species that ruled a large part of the Milky Way Galaxy in the distant past. Collectively, they referred to themselves as "the Host." Their appearance and natures gave rise to many of the monsters and demonic myths of the younger races of the Alpha Quadrant. After a protracted war with another species they called "the Unclean," they were driven out of the near side of the galaxy and exiled to the Delta Quadrant. ( novels, )