Shortly after Mata Nui's departure from Spherus Magna, he created the Makuta species to manage the Matoran Universe and populate it with Rahi. The Makuta formed the Brotherhood of Makuta, with Makuta Miserix as their leader.

Later, the League of Six kingdoms attempted to overthrow Mata Nui and conquer the Matoran Universe. However, the Brotherhood of Makuta prevented this. Inspired by the League, Makuta Teridax formulated a plan to overthrow Mata Nui himself.

Following the Matoran Civil war in Metru Nui, Miserix appointed several Makuta to govern the islands in the Matoran Universe. While assigning positions to the Makuta, Teridax was placed in charge of managing the City Island of Metru Nui as a reward for single-handedly ending the war.

Teridax presented his plan to the Brotherhood, and the majority of the Makuta were in favor. Miserix opposed the plan, as well as five other Makuta. Teridax then led a mutiny, and placed himself in charge of the Brotherhood. He ordered the six Makuta killed, but unbeknownst to him, Miserix was not killed, but imprisoned, and the other five Makuta went into hiding.

Eventually, the Makuta evolved into forms of pure energy, and the Brotherhood commissioned the Nynrah Ghosts to rebuild their armor to accommodate their new, gaseous forms. Teridax realized the Makutas' new forms would be especially vulnerable to the elements of Iron and Magnetism, so he organized raids on known Fe-Matoran and Fa-Matoran settlements, in order to exterminate many possible future threats.

Later, Teridax caused the Great Cataclysm, which put the Great Spirit Mata Nui into a deep sleep. Following this, Teridax would face many setbacks to his plan caused by the Toa Metru, Toa Nuva, and Toa Mahri, until finally culminating in an epic battle in Karda Nui, where Teridax managed to trick the Toa Nuva into awakening Mata Nui just in time for him to slip into the Great Spirit's mind and seize control.

When the Order of Mata Nui came out of secrecy, they declared war on the Brotherhood, but it was already too late. Teridax eliminated the majority of his fellow Makuta & banished Mata Nui's spirit into space sealed within the Mask of Life. Teridax trapped Toa Helryx within the Core Processor, and proceeded to enact his will onto the Matoran Universe.

Roughly 6 months later, Teridax sensed Mata Nui growing stronger, and departed the planet of Aqua Magna to finish him off once and for all. When he arrived on Bara Magna, he found Mata Nui piloting the re-assembled prototype robot, and the two titans proceeded to fight. Although overwhelmed, Mata Nui was just barely able to claim victory by pushing Teridax into the path of an incoming fragment Spherus Magna, which ended Teridax's brutal reign for good.

Abilities & Tools

As a Makuta, Teridax has access to all 42 Kraata powers, including Accuracy, Adaptation, Anger, Chain Lightning, Chameleon, Confusion, Cyclone, Darkness, Density Control, Disintegration, Dodge, Elasticity, Electricity, Fear, Fire Resistance, Fragmentation, Gravity, Heat Vision, Hunger, Ice Resistance, Illusion, Insect Control, Laser Vision, Limited Invulnerability, Magnetism, Mind Reading, Molecular Disruption, Plant Control, Plasma, Poison, Power Scream, Quick Healing, Rahi Control, Shapeshifting, Silence, Sleep, Slow, Sonics, Stasis Fields, Teleportation, and Vacuum. He specializes in the use of Shapeshifting.

Teridax also has full control over the element of Shadow, and possesses limited telepathic abilities.

Teridax was known to carry the Staff of Darkness, a giant bladed staff that he sometimes used to channel his powers. The staff could also be used as a Kolhii stick and was able to hold balls of shadow energy.

Teridax was known to wear the Kanohi Kraahkan, the Great Mask of Shadows. His mask was destroyed while being worn by Makuta Icarax in Karda Nui.

Personality

Teridax had a complex personality that ranged from a fierce enforcer to a cunning mastermind. He was sociopathic, arrogant, proud, and narcissistic, desiring praise and devotion and growing jealous when others received it. He proved himself to be an excellent strategist, considering every eventuality and even planning his own setbacks as he plotted to overthrow Mata Nui. Teridax could also lie and deceive with ease, manipulating others into helping him.

Teridax was seen as one of the most powerful beings in the Matoran Universe; even his fellow Makuta considered Teridax incredibly intelligent and dangerous.

Trivia