Skorm is an evil god of Albion, discredited by the Oracle, which tells the Hero that Skorm and Avo were actually false gods made up by a merchant who discovered two places where the will energy was especially strong. The Temple of Avo was built upon the spot where Will energy gave good thoughts and feelings while the Chapel of Skorm was constructed upon the point where evil Will concentration was most prominent. It can be speculated that the belief in Skorm and Avo was started centuries before the Hero's Journey, as two holy armies held a battle in Snowspire over whose god was superior.
Fable
In Fable and Fable: The Lost Chapters, he is mainly worshiped by the followers that can be found at The Chapel of Skorm. It is believed that the disembodied voice that you hear upon entering the chapel is Skorm himself speaking to you.
Oracle
According to the Oracle in the town of Snowspire, Skorm is nothing more than a hoax that was created by a wandering Trader. Whenever the player enters the Chapel of Skorm, they will hear a disembodied and sinister voice that doesn't belong to either of the two acolytes which are present inside of the chapel. It is likely that this is a third acolyte, which is trying to con or coerce the Hero of Oakvale into making donations.
Notes
- According to the description of Skorm's Justice, Skorm is still worshipped by a small group during the events of Fable III.
- Unused dialogue for the original Fable suggests that at one point in development, Skorm would only ask for donations of Gold similar to the opposite deity at the Temple of Avo.