The Ur-Flannae
The Ur-Flan were a mysterious group among the Flannae about whom little is known for sure. It is known that several of their number, Vecna and Keraptis among them, made themselves overlords of pre-cataclysm empires and these Ur-Flan empires were quite evil. The druids did not concern themselves with the Ur-Flan as long as they were not a threat to the Balance or the Eternal Cycle. This passive acceptance allowed Vecna and others like him to flourish, and some held whole tribes in bondage to their evil. When Vecna betrayed the druids and twisted their power over nature into a source of undeath, they were completely unprepared. Some druids fled, many died, and the few who remained served the Whispered One. A number of scholars believe that the druids who served Vecna rescued many of the Ur-Flan secrets and the Old Faith preserves that knowledge to this day.