The Madman: Keldaroth

In UT 2450 in the Barony of Arkin, high in craggy Cillt-Craiduk, a sickly child was born into the House of Eldwar Daroc, Lord of the land. Named Kel, the boy was Daroc's first son and rightful heir. From his earliest days, Kel bore a heavy mantle of expectations to grow into a mighty warrior and chieftain like his father, but on account of his gentle spirit this would crush him long before he came old enough to lift a sword: At age five he fell ill with a mysterious fever which broke, but left him weakened, and blind in one eye.
In addition to physical infirmity, the lad nursed an addled mind. He rarely slept and spent most nights pacing up and down the castle corridors. He mumbled to himself, either incoherently or in what sounded like a foreign tongue, and was unable to learn the basic skills needed to fulfill his role.
Even as mercy was little known among men of the High North, Lord Daroc loved his son and sought to spare him the worst of his illness, and so assigned servants to tend him by sun and moon. Some accused the Baron of weakness in this matter, but his caring stance held steadfast over many long years.
Those concerned for the fate of House Daroc were pleased when in time, Eldwar's wife, Lady Thywis, birthed another son, Duir, who went on to display the makings of a formidable lord. Duir, unlike his father, did not pity his elder brother. After their father took on a mortal wound during a clan war at Klaangenswir, Duir wasted no time and secreted Kel away to the nearby Monastery of Aurim-Bas, where he was tucked neatly away from court, little more than a prisoner.
There he remained until the end of his short life, dying at 27.
At the onset of manhood, Kel developed an obsession for writing and scrawled on any surface available, with any tool permitted. Whenever the monks were unable to supply him with pen and paper, Kel wrote in his own blood. His graphomania was endless.

by Midjourney

Again around this time, strange things started to occur in the monastery. Objects would hurl themselves across the room. Monks were harassed by unseen assailants. Stone walls would warp and bend. The layout of the grounds even changed several times during his stay.
Being a non-magical order, the monks were far, far out of their depth. They summoned The Seers, Arlok's resident mystics, to beseech their insight, and a small delegation was sent from Bimmentok. Seers are illiterate by vow, thus had no sense for the meaning of Kel's writings, but their senses were besieged with visions of overlapping Fate lines, as though multiple time frames were co-occuring in this small space.
Eventually the Berythians were consulted, given their greater knowledge of magical theory. It seemed clear enough to them that Kel's scrawls related to something arcane but its obvious novelty defied a tidy explanation. Kel died before any interpretive key was uncovered. It eventually came to light his writings were more like mathematics than the typically poetic language both Berythians and Nurhetics employed, and from this new place of understanding, the study of his work began to bear fruit, little by little.
A few of the Seers from the original dispatch chose to stay at Aurim-Bas to steep themselves in the mysteries there. They learned to read for the exclusive purpose of studying The Tangled Scrolls - the name given to the living manuscript overrunning the monastery - and attracted new talent likewise eager to delve into this new form of magic. In this way, The Aurimbic Tradition came to be.
The Tradition grew in stature, and Kel was recognized as a Master by Berythians, and dubbed Keldaroth, after the naming conventions of their Order. This watershed moment took a long time to come about as Kel, strictly speaking, had never cast a spell in his life, and to this day remains the only Master worthy of that title not to do so.
The original Seers were divided on the path forward, and a schism occurred splitting those with the Sight off from others more excited to align themselves with a textual tradition, such as as south had always had. Due in large part to Berythian and eventually, Nurhetic, support, the Aurimbic Tradition flourished, while the Seers existed in ever-dwindling numbers, tending their drafty caves.