The record of Sarna Dream-City of the Aelfpaths is from an ancient spirit to the first elves of Ynth on the shores of Lake Evendim. This was referred to as The Oracle of Sarna, and was found to be a serpent-like (Amenti-Epyp?) ghost visage tied to the faded Laey upon the Aelfpaths. It has since been recorded in a few places, but is impossible to find outside of elven records of Ynth.
There in the land of Marthi a vast lake that is fed by no stream and out of which no stream flows, stood the great city. Twenty or more millennia ago there stood by the shore, the moving city of Sarna. Sarna stands there no more. What is told is in the years when the world was young before man, elf, or any humanoid ever came to the land of the lake that is lost, ventured what would become the inhabitants in Sarna.
A study was made by the elves of the lake; the nearly underwater ruins of the gray stone city of Ibir were found in the reeds. That city was as old as the lake itself and populated with beings not pleasing to behold. No longer were the citizens of Ibir city dwellers, their home was the lake. Skin as green as the lake in the mist is about it but they have bulging eyes, flappy lips and strange curious ears and were without voice. Also whispered was that they worshiped a green stone idol chiseled in the likeness of an ancient and silent water serpent before which they danced horribly when the moon was gibbous. These things are known.
And so, plans for Sarna came to rest on the ruins of Ibir, as Ibir was on the ruins of something older. Stone by stone each night the great moving city was built back up upon the ruins that came before it. Terrible was the wrath of the once-dwellers of Ibir, and bloody was their fate. Those of Sarna had done this countless times, and with them the power of their Olde Gods. One night, long after the last dweller of Ibir had been laid to rest, the fog from the lake became thick, rolling over the countryside, and it devoured Sarna.
When wings of dream sought refuge, they found Sarna stilled. Sarna would never again move physically. Within its walls, the preserved inhabitants rested where they fell or sat, content to substitute the dream of it over real sustenance. And so the city, down to the last pebble, passed into dream wherein it became a fixture in the dreamsleep of the dragons and the oldest of gods. Its name echoes forever across the endless void, followed by a warning to those who would be all things… Doom was the word, Eternity was another. Come See it whispered. It sits there now, its doors open who would dare dream of entering it.