"Kraata-Kal"

Normal Kraata were created from Makuta of Metru Nui's essence and could control Rahkshi armor. But Kraata-Kal was exposed to the energies that turned the six Bohrok into Bohrok-Kal and came out with the ability to control Fire, Water, and Shadow. Makuta built armor for Kraata-Kal that was far more powerful than standard Rahkshi armor, and presumably gave him to the Dark Hunters like he gave the Rahi Nui and Voporak. Kraata-Kal was too ambitious for his own good, and "The Shadowed One" has had to "discipline" him for putting his own profit ahead of the mission. He was sent as part of a team sent to capture the Piraka, it is uknown what became of him after the Piraka were mutated.

powers and tools
Besides his elemental powers, Kraata-Kal had a double-bladed flame sword and a Kanoka Disk Launcher.