It was in the Fourth Era that the culture of the Calx first begain to flourish, for many strange happenings had shocked the people out of their complacency. The taming of the Titan, the emergence into the upper air and the second comming of Niklas all made the reef strange with new ideas.
One of the strangest ideas was that of the Record. A few of the most elder calx, the wisest coral in the deep, had come together to pass on their lore before thep passed on themselves, and thus declared themselves to be wise masters who would teach students only if they would promise a year of service, reciting the Record of history, of tradition and of all knowledge held by the calx for all to hear, carrying it to the far reaches of the reef. Each year new students would join and pay their tutition in service and then become educated in the ancient lore, some going on to become masters in their own right.
Many subjects were contemplated: zoology and theology at the shrine of Niklas [20.11], meteorology and astronomy in the northern sea, [21.09] and geometry and architecture along the southern shore [20.13], where a strange doorway had been built in a age long gone by.
It was the blessing of Niklas that inspired the theologicians at Calx'yleth to study the creatures of the sea, which had once been viewed as trivial and unimportant for their brief lives and reletive uselessness. It soon came to be whispered that those Holy Masters taught by the Hidden Master (as Niklas was called there now) would be able to part the muhwa with a hymn, to compell a thrimet to emerge from its hole or a mhwap to flee in terror, and to induce the goblops to scale the coral towers and emerge into the upper air. It was also thought, at least in the east among the Retha, that the wise masters could use their godly powers to imbue the creatures of the sea with the power to walk upon the lands.
In the north, the calx became far less observant of the power of Niklas, and proud within themselves for it. They had unravelled the secrets of Sun without the aid of the Gods, and proclaimed that they were NOT the power of Niklas shining down upon them only to be extinguished, but rather a great orb of light that moved through the heavens and sunk below the horizion each night. They too had discovered the secrets of the Moon, of the wind and waves and had set to work on forseeing the motion of the clouds and the passage of rain through the heavens, all without the blessing of Niklas or aid from the Gods at all. And, strangely enough, it was they who held the tallest tower, as Niklas had ordained in secret to his faithful, not for his glory, but for their own use.
And in the south, there was the Door, which was a thing of right angles and straight lines not found in the deeps, which inspired the Masters of Shapes to bend their bodies with stone and and shell into strange shapes unnatural to the calx, with flat surfaces and hard angles, in hopes of obtaining the mystic powers of the Door thereby. Corals became cubes, pyramids, spheres, stars, thin rods and flat planes in those seas, with shapes stranger still interspursed. And in doing so they discovered much about geometry and the myraid ways in which stone and coral can be made to move as one into a new whole.
-The Calx form settlements around the spires at 21.11, 20.13 and 21.09, centered around the teachings of the Wise Masters that live in the spire there.
-The Calx work out the patterns of the Sun, Moon and Tides and experiment with new forms of coral based body modification/architecture.
-Those blessed by Niklas work hard to master their new-found powers, trying to control sea creatures with it.