User blog comment:Twilight Despair 5/Thule, Magic, and Possible Origin to Pagans./@comment-24169020-20130217163607

I think the Pagan Gods on Supernatural are created from Tulpas (Thoughtforms). Tulpas are thoughts made real by belief (more or less). Seeing as how people used to worship them, they were alot more powerful. Now that they don't, they have grown much weaker but enough people still believe in them that they still exist.