The Tolarian mage-kings ruled Old Tolaria from Elderran for seven generations, and across all seven they served one idea. They held that magic had grown intolerably tangled. Elemental force bled into arcane formulae; divine power soaked into the leylines and bent them; the Faesong ran under everything like water under a floor, impossible to silence and impossible to isolate. To the mage-kings this was not the natural order of things. It was contamination. A working done in tangled magic could never be wholly understood, and what cannot be understood cannot be made clean. They wanted each tradition restored to its pure form, separated and bounded and worked unmixed, and they were willing to take three centuries to get it.
This was a creed, not a whim, and it was taught as one. A child of the line learned before anything else that the world they had been born into was a corrupted draft of a better one, and that their family existed to correct it. The court at Elderran called the doctrine the clean working. Its first article was that no two magics should ever again touch, and its last was that the dynasty would not be finished until they no longer did.
Mixed magic is a lie told quickly enough that no one catches it. We are not building a weapon. We are building the truth a sentence at a time, and the truth does not care how long it takes. — attributed to Aurelan, founder of the line
The line of Aurelan
The work began with Aurelan, the first mage-king, who is remembered less as a conqueror than as the one who first wrote the clean working down as a thing a kingdom could spend itself on. He did not live to see a stone of the Apparatus laid. None of the early kings did. The design demanded the pooled knowledge of generations who would each die with the machine unfinished, trusting an heir to carry the next stretch of it, and the dynasty made that trust its central virtue. Succession ran by blood and by competence both. An heir who could not hold a tradition perfectly unmixed was passed over for a cousin who could, and the line bent its marriages, its fostering, and its long apprenticeships toward producing adepts equal to the next phase of the build.
Their summit was Mount Tolaria, the highest fixed point in the region, where the dynasty kept its primary observatory and ritual citadel. The leylines converged beneath the mountain's roots and the sight lines reached for a hundred miles, and from that citadel the mage-kings charted the planar anchors and the conduit-runs that the Apparatus would one day need. What stands there now is sheared flat to glassified stone, but the work that doomed Elderran was first drawn on Mount Tolaria's summit.
By the final generations the dynasty had become something narrower than a royal house. It was a single multi-century project wearing a crown. The kings governed an empire of practitioners who studied every tradition that existed, and they governed it almost entirely in service of the day the traditions could be pried apart for good.
The activation
That day came under Caedran, the last mage-king and the chief architect of the finished design. He gave the order to activate the Apparatus of Severance, and he threw the final switch himself. What the machine did to Elderran when it half-succeeded is told in the city's own account. What concerns the dynasty is that the catastrophe did not spare its makers. It took them first.
The activation was not unopposed inside the family. Olarane, a mage-queen of the line, argued that the Apparatus would not hold what it was built to hold, that a partial severance would be worse than no severance at all, and that the design had no way to be stopped once begun. She was overruled. She stayed in Elderran to try to halt the activation by hand, and she is in Elderran still, frozen in the dilated center where the seam runs slowest, caught in the middle of a warning that has not yet finished leaving her mouth.
The severed and the one who was not
The fate of the dynasty is not settled, and the unsettled part is the lever. The machine turned on its makers, and it did not take them the same way. Some died the instant it caught them. Others are centuries into deaths the slowed time will not let conclude, dying yet. A last group met neither end, remade instead by the magical chaos into wandering things that still carry scraps of who they were and drift through the interior, speaking of the old empire with the ease of memory. Caedran himself is the central case: frozen conscious at the Apparatus's heart in the deepest dilation there is, its unwilling operator, living the disaster he authored in slow motion with no end he can reach.
One mage-king is accounted for differently. Vesimar, whom the survivors' rumor names the Unsevered, was not in Elderran when the switch was thrown. He left before the activation, or at the very instant of it, and so the severance never cut him. He is loose in the world now, his life stretched thin across centuries by a pocket of the stolen time-layer he carries with him, and he has not given up the creed. He still means to build a magic worked perfectly clean. He is the proof, walking, that Old Tolaria's containment has leaked from the first day, and the open question the dynasty leaves behind is the one he embodies: whether the clean working was a madness that died with its makers, or a design that simply needs a second attempt somewhere the first one's mistakes can be corrected.