Telzdregh came about when the Imperial named Yindda was banished from the Empire to the south lands near the Hewn City. Few other exiles were dwelling there at the time, because the Imperials feared it was a cursed burial ground and they would become Emperors if they died or slept there. The dragon who had to live in these conditions was disliked and had little other places to go, however. He feared to touch the earth and so took up his refuge under the river crossing. A grave keeper, the Pearlcatcher named Brylutges, saw Yindda struggling and befriended him, vowing to protect their soul though he did not know how. Imperials and Pearlcatchers were near-enemies at the time, but Brylutges was privately quite afraid of Emperors, and this stubborn dragon was determined to stay there. He kept a close eye on Yindda and took up residence with him. Even after Yindda eventually conquered his fears and was unafraid to adventure the ruins, their original lair grew to overtake clefts in the surrounding cliffs and ledges.
When other Imperials thrown out by the corrupt court learned of this safe haven, they came seeking asylum too, and it became a point of congress between different Flights. (Its census of Imperials have always outnumbered Pearlcatchers, therefore more of their philosophy is known to us, than that of Pearlcatchers.) To prevent being overburdened by travelers, Brylutges and Yindda adopted a password system in the form of sphinxes, sacred beasts that would give them riddles to pass. They called this new clan Telzdregh or "root alliance", since it was the first alliance to take root in the area. (In modern Cazric this is spelled Talztregc)