Dadradah was one of the forgotten religions from before the Final Empire. It was found in many different countries. The central tenet was a belief in one god and worship was through art. To its followers, being an artist was an even higher calling than being a priest. Its symbol was a paintbrush.
Before the battle for Luthadel, Sazed preaches to Clubs about the Dadradah and presents him with a wooden disk on a necklace, carved with its symbol. Clubs rejects the faith, but when his body is found after the battle, he is wearing the disk.