Energy Hound

Energy hounds are canine 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. that track other beings by their unique energy signatures. They served the guardians of the PitThe PitThe deep-water prison of the Matoran Universe, built by the Order of Mata Nui to hold the Barraki and other beings too dangerous to execute., the prison for the Matoran Universe's worst criminals, where the jailer HydraxonHydraxonThe jailer of the Pit was killed once, then resurrected as the Matoran Dekar by the Mask of Life. warned that an energy hound, once on your trail, would follow you to the edge of the universe and beyond for however many centuries it took. (BIONICLE Legends 7: Prisoners of the Pit; BIONICLE: Encyclopedia Updated)

Biology#

Energy hounds track their quarry by sensing its unique energy signature, not by sight or smell, which is why Hydraxon could promise that one would follow a fugitive anywhere, for centuries if need be. They fight with sharp teeth and claws. (BIONICLE Legends 7: Prisoners of the Pit; BIONICLE: Encyclopedia Updated)

The 2007 set shows Spinax with red eyes and a row of spikes down his back. (Maxilos & Spinax, LEGO set 8924)

Use by the Order of Mata Nui#

The PitThe PitThe deep-water prison of the Matoran Universe, built by the Order of Mata Nui to hold the Barraki and other beings too dangerous to execute. held the most dangerous prisoners in the Matoran Universe, and energy hounds helped its guardians keep them there. Hydraxon was the Pit's jailer, and its guards included Maxilos robotsMaxilos RobotsBuilt by Artakha and deployed by the Order of Mata Nui to guard the Pit, a single Maxilos unit was later hijacked by Teridax during the Mahri Nui arc.. (BIONICLE Legends 7: Prisoners of the Pit; BIONICLE: Encyclopedia Updated)

Spinax#

SpinaxSpinaxSpinax is an Energy Hound who serves the Order of Mata Nui on Spherus Magna. Grey and silver in coloration, Spinax relies on its teeth and claws as tools in carrying out its duties as a servant of the Order. is the only energy hound the story names. He served a Maxilos robot in the Pit. When the Great Cataclysm shattered the prison, he was changed by the mutagen in its waters and became able to breathe underwater. (BIONICLE Legends 7: Prisoners of the Pit; BIONICLE: Encyclopedia Updated)

During the Toa Mahri's hunt for the Mask of Life, Makuta TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna. took over Spinax's Maxilos robot, and Spinax kept following it. The 2007 set sums it up: a robot guardian of the Pit taken over by an evil intelligence, aided by his energy hound. (BIONICLE Legends 7: Prisoners of the Pit; BIONICLE Legends 8: Downfall; Maxilos & Spinax, LEGO set 8924)

Tracking limits#

Spinax's loyalty followed the robot, not the mind inside it. When Teridax took over the Maxilos, the energy hound went on serving it all the same. The story never explains whether an energy hound could tell the difference. (BIONICLE Legends 8: Downfall; Maxilos & Spinax, LEGO set 8924)

Status#

Energy hounds appear only in the 2007 story of the Pit and in reference books, with Spinax the one named example. The story never says what became of the species. (BIONICLE: Encyclopedia Updated)