Spinax

Spinax was an Energy HoundEnergy HoundRare predatory Rahi able to track living beings by their unique energy signatures, deployed by the Order of Mata Nui as tracking assets in the Pit. kept within the Pit, the undersea prison where the most dangerous beings of the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control. were confined. There, Spinax served alongside Maxilos, a robotic guard, under the jailer HydraxonHydraxonThe jailer of the Pit was killed once, then resurrected as the Matoran Dekar by the Mask of Life..

When HydraxonHydraxonThe jailer of the Pit was killed once, then resurrected as the Matoran Dekar by the Mask of Life. captured MatoroMatoroA quiet Ko-Matoran translator who became a Toa Inika and then a Toa Mahri, Matoro gave his life with the Mask of Life to restore Mata Nui. and placed him in a cell on the Pit floor, he introduced the ToaToa (2001)Biomechanical heroes bonded to elemental powers and masks. Not born, but chosen and transformed. to both Maxilos and Spinax. The Maxilos robot had been taken over by Makuta TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna., who claimed to be on Matoro's side. Using his power over RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts., Teridax was able to direct Spinax, turning the Energy Hound against the prison's own jailer.

During the struggle that followed, Teridax had Spinax hunt down Hydraxon to drive him off, and Spinax repeatedly attacked the jailer to cover the escape of JallerJallerJaller served as Captain of the Ta-Koro Guard, led the Toa Inika to Voya Nui, and commanded the Toa Mahri through the recovery of the Mask of Life. and Matoro with the Kanohi Ignika. In one such clash, Spinax struck down GorastGorastA Makuta defined by rage and ruthlessness, Gorast conquered the Visorak and became Teridax's most devoted enforcer. during a confrontation, forcing her to flee. After Teridax's essence departed the ruined Maxilos body, Hydraxon later came across Spinax beside the irreparably damaged robot.

Spinax was afterward counted among the forces of the Order of Mata NuiThe Order of Mata NuiThe covert organization founded by Helryx to serve the Great Spirit directly, operating in concealment from a fortress on Daxia and waging the open war against the Brotherhood of Makuta that decided the fate of the universe., the secret organization to which Hydraxon belonged.