The Sinking of Trudanse

The first people to settle Caesin did so out of desperation. They desired nothing but to find a safe place to live, share, and grow.
It meant turning away from the homeland that was gifted to them by their creators, which some interpreted as them turning away from the creators themselves.
Shunned, scorned, and cursed were they who left for different shores; bound to find nothing but blood-stained lands and barren wastes.

But Caesin wasn't barren, it was rich. Rich in forests, nestled against tall mountains, whose veins glimmered with silver and gems. Rich in rolling plains, across which mighty beasts roamed far and wide. Even the arid wastes and deserts hide precious magical crystals among their many layers of sand.
Eventually, some of the ships returned to Tibur. Loaded with the many riches of their new homes, the settlers traded for the luxuries and crafts their lands could not yet provide.

But of course, word of this quickly spread throughout Tibur, and those who felt downtrodden, lusted for wealth, adventure, or all of it at once, joined the settlers on this continent of heathens. Turmoil and conflict were not unknown to the settlers of Caesin, but these newcomers were exactly what they tried to escape.
Great powers stirred in the homelands, each moving in secret so as to not reveal their plans to the others. Even some of the most ancient conflicts quieted as all eyes turned east.

Chanting priests and clergymen stood atop the bows of the first ships as they declared that Caesin too was granted to the Peoples by the everlasting Founders; All lands and riches beyond belonged to the faithful and their kin.
Their ships landed at the mouth of the yet unclaimed bay of Chantiso, the land of song. The city of Trudanse grew atop and into the sprawling and glittering caves that lay below the bay.

Its craftsmen were skilled, its tradesmen were wealthy, and its statesmen were powerful. The colony grew and grew, with old and powerful houses laying claim to the virgin lands that lay east of the great harbor cities.

They say it happened on the very day the Cesine Kingdom was founded.

With power and wealth aplenty, the greatest statesman of the colony turned against the old powers of Tibur. He claimed that his subjects were the rightful inhabitants of this once accursed land, now littered with gifts from and monuments to the great Founders.
The ceremony was lavish and drew people from across the realm. All wished to see the moment their new king would be crowned. A great crown for a great man, it was adorned with the finest of jewels, sculpted by the finest artisans, and mined from the deepest mines. It was the symbol of Trudanse, and would also be its downfall.

As the One Day King received his crown, the ground began to quake. Ships that lay in the harbor suddenly dropped below the waves, as if the water could no longer hold them afloat. Great buildings groaned under their own weight, as their structures were torn by the shifting earth. The wind blew into the bay, not letting any ships escape, while molten rock sealed the lowest mines shut.

Drowned under the waves it once tamed, swallowed by the deep mines where it carved its riches, Trudanse was no more, and would never be again.
And the old powers turned away; this land was cursed, after all.