Marendar

Marendar was a living weapon created by the Great Beings to eliminate Toa.

History
During the construction of Mata Nui, the Order of the Great Beings realized that the Toa species could pose a significant threat to the inhabitants of Spherus Magna if they ever escaped the confines of the Matoran Universe. In an attempt to prevent such a scenario, the Great Beings designed a living weapon named Marendar to hunt down and destroy Toa. Marendar was placed in a vault beneath Bara Magna to be released if the Toa ever went rogue.

In 150,081 CMT, Angonce proposed the creation of a new robot to hunt down and destroy specific targets (in this case Uterio War combatants), which was similar to what the Great Beings achieved with the Baterra and Marendar.

In 150,082 CMT, DU Shockwave ordered DU Muta and DU Ultron to instigate a war between the Glatorian and the Vrai on Bara Magna in order to provide MECH with an opportunity to take Marendar for themselves. DU Muta assassinated a Fire Tribe Agori while DU Ultron located a Vrai cruiser and forcibly entered it through a blast hole in its hull, killing any crewmembers he came across on the way to the laboratory. Upon reaching the laboratory, DU Ultron shot a Vrai scientist in the leg and intimidated him into divulging the status of "Project Marendar". When the scientist replied that the Vrai had a "workable prototype", DU Ultron completed his mission by incapacitating the scientist with his encephalo-ray, downloading some data on Project Marendar, and programming the cruiser's computer to attack a nearby Agori village. He then left the cruiser through another blast hole as it obliterated the village with concussion and EMP blasts.

Once DU Shockwave had been notified that DU Muta and DU Ultron had successfully instigated the war between the Glatorian and the Vrai, he instructed DU John Sheppard and DU Uterio di Armechio to go to Bara Magna and secure Marendar. DU Uterio did not know what Marendar was, so DU Shockwave informed him that Marendar was a robot designed by the Original Universe's Great Beings to destroy Toa, which would be useful to achieve MECH's goals.