Arethidas

Arethidas is a Glatorian-turned-warlock.

History
Like most Glatorian, he was born on Spherus Magna under the rule of the Great Beings. Arethidas became a member of the Water Tribe, and served the Element Lord of Water when he came into power. When the Elements Lords waged war over a pool of Energized Protodermis, Arethidas joined his tribes army and fought in the Core War. Over time, he climbed through the ranks an eventual became a trusted general of his Element Lord. He and Tarix have fought alongside eachother on at least one occasion. It was on that occasion that the two shared their views of their ruler. While Arethidas believed in him, Tarix wasn't so sure that their master's motives were benevolent.

As the war went on, Arethidas pondered on his collage's words. The longer he fought, the more his faith withered out. While he and his squadron were patrolling the wastelands, he came across some old ruins of unknown origin. The team ventured into the heart of the tomb, and discovered an artifact within it. The relic sense them, however, and killed his brothers-in-arms. Outraged, he charged at the pedestal, only to be zapped himself. However, the blast wasn't intended to harm him, but rather to link him to the object. It was there that he came into contact with an unknown entity residing in the nothingness beyond Reality.

The two had a conversation, and made a deal of someform. What the deal was is unknown, but Arethidas did accept the terms. He was transformed into a being best described as a liche, revenant, or warlock. He discarded his old tools and armor, replacing them with a set of new ones. He eventually completed the deal with the cosmic horror, and the two went separate ways after that. Rumor has it that he has been hopping between dimensions from time to time, though it is unknown as to why. A few rumors claim that he's tracking a person of interest, though the being in question is also unknown.

Abilities and Traits
Arethidas was a faithful warrior, and was considered brave and valiant. He was devoted to his people, including the Element Lord of Water. As the Core War went on, however, he developed a bitter resentment toward the Element Lord. He respected and cared his fellow soldiers, who had gone through the same suffering as he had. After his transformation, however, he became colder and more distant. He became interested in the occult, researching a number of different cultures, beings, and powers.

As a Glatorian, he had no special powers and had on his natural strengths to survive. That changed when he touched the artifact, granting him a number of powers and altering his appearance into something that'd be considered undead. Despite the latter trait, he's retained his intelligence, memories, personality, and sanity. The process allows him to warp or bend Reality to certain degree, one of many names. Some call it "Magicks", others "Sorcery".

Many of these magicks include all forms of Psychokinesis, as well as the ability to channel cosmic energies to preform all kinds of feats. This energy is sometimes referred as "magicks" or "mana", and be used as an alternative to Elemental Energy to cast non-Elemental "spells". He is also said to manipulate spiritual energies, and is considered by some to be a "Necromancer" as well.

Mask and Tools
Arethidas wasn't born in the Matoran Universe, and as such, bore no Kanohi mask. However, it may be possible that his transformation allows him to use them. As a Glatorian, he wielded a spear and shield during the Cold War, and wore heavy armor. After his "ascension", he discarded his old tools and armor. He's since been seen wielding a bladed staff, and wears a set of light armor under his robes. There have been accounts of him wearing a mask, helmet, and/or hood as well.

Trivia

 * His name was suggested by Solix Arclight (AKA, TheGreatMataNui), a former BIONICLE MOCist.
 * He was inspired by Pious Augustus from Eternal Darkness: Sanity's Requiem and Miraak from Skyrim 's DLC, Dragonborn.
 * He has a copy of The Nameless Tome. This suggests that he's had contact with The Abstract, though the relationship between them is currently unknown.