[Rough idea. I may make some changes later]
While undergoing the nine days of tribulation lightning, Xuan Le was struck by a bolt as he tried to save his mother. He had only thirty thousand years of cultivation to begin with, and the blow forced him back into his original form and erased his memories. He remembered only that he was a little fox cub, with nowhere to go.
Before he had even left the mountain, he accidentally stepped into thin air and landed in the Regent Prince's palm.
Across the Five Continents, cultivators of spell arts were revered above all others. The Central Plains were different, however, because they had a Regent Prince who had never known defeat.
He Linyuan had already reached the Void Refinement Realm without forming a pact with a spirit beast. All cultivators admired his strength, yet feared his aloofness.
But He Linyuan had a secret no one knew: he was one of the ferocious beasts born at the dawn of the Five Continents. He could take human form and alter his appearance, and no one could tell. The one thing that set him apart from ordinary people was that he couldn't get close to spirit beasts, let alone form a pact with one.
Except for... the little fox that had fallen into his hand.
It was barely half a palm in size. When he pinched its fluffy tail, it even nuzzled into his hand, and it wasn't afraid of strangers.
So he decided to keep the little fox cub, who had no cultivation, by his side.
On the road back to the capital, the little fox accidentally licked his blood. Why had the fox cub turned into the elegant young gentleman who had saved him that day? But the fox cub's seal had yet to be removed. He maintained his human form for only a quarter of an hour before turning into a little boy of four or five. He said his name was Xuan Le.
Word spread like wildfire through the capital's teahouses.
They said the Regent Prince had always had someone dear to him, but that person had been too frail to live long and had left behind a child. The Regent Prince had left the capital this time to bring the child home.
Why did everyone say that? Because the Regent Prince himself had declared it.
"This is the heir, He Xuanle."
The whole capital had to dote on this precious little prince, because he was the Regent Prince's most prized treasure.
Later, when the young heir mysteriously disappeared, the prince flew into a rage and vowed to turn the Five Continents upside down to find him.
Later still, the capital was decked out in wedding finery, with flower petals filling the sky. The Regent Prince was taking a wife.
Who could possibly catch the Regent Prince's eye? They said his moonlight was not dead after all, and had been brought back to life.
Why did everyone say that? Because the princess consort and the young heir looked exactly alike.
But why had the young heir disappeared without a trace?
Theme: Only by being independent can you overcome everything.