Lore:Iachesis

Ritemaster   was the leader of the  , a long-standing monastic group of mages dedicated to studying the Old Ways. He was widely considered one of the wisest and most powerful mages in history,  and led the Order for at least three and a half millennia.   

History
Iachesis is known to have been the head of the Psijic Order as early as  , when the mage   went to the Isle of   to meet with him. Around that period, the Psijics served as counselors to kings of Summerset and proponents of "The Elder Way", though the Order later chose to take more neutral approach to world affairs.  In  ,   and   were recorded as having met with Iachesis after the signing of the  . 

In the early  , former Psijic sage   brought a young 11-year-old boy named Trechtus to Iachesis. He recognized the young boy's potential and welcomed him into the Order, bestowing the name " " on his new pupil.  Many years later, Galerion became disillusioned with Iachesis and the Psijics when they exiled the aspiring necromancer   instead of imprisoning him. Iachesis was one of the people Galerion had to answer to when he began collecting mages from all over   to form the new  , which he eventually did after leaving Artaeum and the Psijic Order for good.   

Shortly after the founding of the guild in  , Iachesis fought a group of four  s known as the  , whose goal was to sink the Summerset Isle and claim it for the Sea Sload underwater kingdom of  . One of the members of the Cabal,  , managed to overpower the Ritemaster with his mind magic, and made him steal the Heart of the  , the central part of the Stone of the  . Then he altered Iachesis' memories so he would remember defeating and killing K'Tora instead. However, Iachesis was able to partially resist K'Tora's magic, and desperate to keep the Heart out of the Sea Sload's hands, he accepted  's offer to help. The   called Iachesis to  , where she taught him a spell to hide the crystal, and declared that without a special passphrase—in a language only mortals could use—no one would be able to find the Heart, not even Iachesis himself; he then hid the Heart within himself, unbeknownst to Nocturnal. The Ritemaster forgot the whole event when the deed was done. With what was left of his free will, he was able to remove Artaeum from Nirn, out of the Cabal's influence. This freed him from K'Tora's control, but his memories remained altered.  

Around  , the Cabal returned to the Summerset Isle, allied with the  , an alliance of worshippers of Nocturnal,  , and  , who themselves formed an alliance called  . After the agents of the Court managed to locate Artaeum by kidnapping the Oracle of the Wyrd, K'Tora used the power of  s to invade the Psijic island and attempted to pry the location of the Heart of Transparent Law from Iachesis' mind, but was stopped and killed by the  . Afterwards, Iachesis gradually regained his memories, and soon found himself with the Vestige, the fellow Psijic  , and  's champion   in Evergloam, where the group attempted to learn where Iachesis had hidden the Heart. When they reached the ritual site and learned that the Heart was inside Iachesis' body, Mephala and Clavicus Vile appeared and tried to retrieve the crystal. They were interrupted by Nocturnal, who betrayed them, banished them from her realm, and tore the Heart from Iachesis' body, killing him. Nocturnal planned to use the Heart to gain control of the Crystal Tower and use it to spread her influence to every possible reality. Her plot was ultimately foiled by the Vestige with the aid of Mephala and Vile, and Valsirenn became the temporary Ritemaster of the Psijic Order. 

Artaeum returned to Tamriel some one hundred and fifty years later, but the Psijics would not, or could not, offer any explanation as to where the Isle had gone or for what happened to Iachesis. 

He was featured a character in the historical fictions   and  . 

Notes
: 
As the Ritemaster, Iachesis' mascot was a Psijic bear cub. 

References