Crisyx was created around 100,000 BGC by Mata Nui. He was soon found by Miserix and became a member of the Brotherhood. Since the Makuta were in charge of creating biomechanical beings known as Rahi, Crisyx was in charge of slaying any of the "failed" Rahi. Because he had a such an important job, he was a well-respected Makuta and one of the most feared.