"Long ago, in the timeless tapestry of existence," a man began, his words drawing eager eyes around him.

"There was an era known as 'Ancient Mysteries.' In those primordial days, when the universe itself was but a newborn star, ancient beings, ethereal and wise, known as the 'Elders,' harnessed cosmic energies. They whispered secrets to the cosmos, and in return, magic was born, bringing life and wonder to the void. It was during this time that mythical creatures first danced upon the tapestry of creation."

"Yet, as the cosmos wove its intricate web, the Elders vanished into the boundless expanse, leaving behind powerful artifacts that shimmered with the echoes of their knowledge."

"Vanished? How did they vanish?" asked one of the children with eager curiosity. 

"And what kind of powerful artifacts were they?"

"Now, now," the man continued, "the disappearance of the Elders is yet to be fully known, but it is said that they left a part of themselves before departing."

"What's that?" inquired another child.

"That, my dear, is civilization."

"Ohhh," the children chorused in wonder.

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"The civilization of Riva went through many eras, with world-changing historic events before it became what it is now."

"In the 'Rise of Empires,' kingdoms rose like mighty mountains, each adorned with its unique tapestry of magic and societal structures. The 'Age of Legends' saw the ascent of powerful wizards and gallant knights, whose feats were sung in ballads across the land. But with power comes strife, and conflicts unfurled like banners in the wind, as kingdoms vied for control of the enigmatic Elder artifacts." The man paused, observing the children's curious reactions.

"Then, like an unbridled tempest, 'The Cataclysm' arrived, forever altering the world. The 'Celestial Sundering,' a cataclysmic event of unimaginable force, shattered the continents and silenced much of the magic." 

A gasp escaped from one of the children. 

"Societies regressed, falling into the embrace of medieval-like feudal systems. But amidst the fragments of the past, remnants of a forgotten civilization, pockets of futuristic technology, gleamed like stars in the night sky."

"However, In the 'Renaissance of Magic,' hope blossomed anew. Magic, once forgotten, began to flourish once more. Alchemists and scholars toiled tirelessly to unlock the ancient secrets hidden within the Elder artifacts. Yet, in this era of revival, a tension brewed between those who cherished tradition and those eager to embrace the promise of technological advancement. 'Technomagic Integration' marked an era of harmonious balance. Understanding of the Elder artifacts birthed 'technomagic,' where cities blended medieval grandeur with the marvels of floating airships and energy-based weaponry. A council of scholars arose to safeguard the delicate equilibrium between magic and technology."

"As the horizon expanded, the 'Age of Cosmic Exploration' dawned. Ancient star maps unveiled the boundless cosmos, and hopes to establish spacefaring civilizations were recognized."

"Ohhh," chorused the children once more.

"Now, we arrive at 'The Chosen Ones.' In a time of tension between magical and technological forces, five souls are born across distant continents. Each bears the unique mark of destiny, embarking on their individual journeys to uncover the forgotten wisdom of the Elders and the secrets that weave their world's history. As their adventures converge, a choice of cosmic consequence awaits, one that could shape the destiny of their beloved universe, Riva."

"But what about the 'Celestial Sundering'? How did it occur?"

"Are there still wizards?"

"I am very hungry."

The entity smiled as the curious faces revolved around him.

"That, my dear children, is a story for another time."