Graydahk

Graydahk is the mysterious Makuta overlord behind the Brotherhood of Rhaikan. His power is beyond anything the Toa have ever encountered, even from Teridax himself. His essence surrounds the entire island of Talekor, and he sees all that goes on. The Toa have been un-able to launch a surprise attack on the island for this reason. Thwornok, Graydahk's second in command, has only met face to face with Graydahk twice. Those two times were enough to strike fear into his heart however.