The Black School was founded in Iceland, beneath a lava rock formation known as The Black Castles. It was there, in the underground caverns, students, new clergymen among them, went to learn the black arts, arcane teachings on all manner of horrific subjects.

The teacher is said to have been Satan himself. Graduates of the School went on to form their own Satanic cults. At some point, Avram Siegel informed Gabriel Rosetti that they branched out to the USA, setting up a Black School in San Francisco, California.

These are not men to trifle with. They can be cruel and sadistic.

Satan sent the demon who had posed as Daimon Hellstrom to lead the San Francisco branch of the Black School, in an effort to draw out the true Daimon Hellstrom.

The imposter led a number of capturing and ritual sacrificing of homeless people. Hellstorm learned of this and sent an anonymous note to Gabriel Rosetti, knowing he would investigate the School and try to stop it. Rosetti learned of the Black School from Avram Siegel, and infiltrated their number. However, Rosetti revealed himself when the imposter prepared to slay a woman. The imposter easily overpowered Rosetti and prepared to kill him, when Hellstorm revealed his presence, drove off the demon, and dispersed the cultists.