Based on The Labyrinth and The Goblin King – Jareth, this is version one of the prompt. The second is very different.
A kingdom of magic in ruin and chaos was good for no one. After too long alone in his palace, Jareth put his labyrinth in order.
Yet he watched her through a mirror, unable to look away, and his resentment grew. Her life, her choices, the man she chose, the child she bore, were so insipid. So ordinary.
Jareth was disappointed and – unexpectedly – not bored by it. His interest never waned.
Goblins returned to their lives, in time. The city was rebuilt. Poor souls were caught in Jareth’s magic, but none were her. None challenged him as she did, even if they stayed.
Every night he returned to the mirror. To her, and in time, her child.
Elina was just like her mother. Black, wavy hair fell around her pale sweet face.
Jareth wanted her for his own, a cruel thread wove in his heart, and he spun it into gold. He wanted to play.
He waited until she was sixteen, just as her mother was.
He infected the girl’s dreams, offered wild hopes and revelations. She was sweet and kind and lost in what he gave her. At night he sought her out. She dreamt of owls, of dancing and love, and when he appeared one starlit night, her eyes lit up with wonder and interest.
Standing before the thing he most desired in a charming gold coat that glittered at her with his feathery hair and owlish touches, the Goblin King was beautiful and powerful, and he knew it.
The lights came on, startling Jareth. His blood rushed at the sight in front of him.
Older now, a life lived in her eyes, causing him anger, and something else. Regret perhaps or longing; all those years watching her age and move through an ordinary life hardened his resolve.
“We did this once so why are you here?”
“Sarah, you look old.”
She raised her head. “I am, thank you.”
Elina looked at her mother and the wild danger that she knew already.
“Tread carefully, Sarah,” he said, glancing at the girl.
“You cannot take her. No one asked you here, and no one made a wish.”
“Are you sure of that? I have watched you from afar, I have waited patiently, but find myself disappointed in you. The choices of your life and what could have been for you had you stayed with me makes me curious. But this creature,” he gestured at the bed, “is lovely, as lovely as you were.”
Sarah moved slowly with no naive innocence or wide-eyed wonder at the Goblin King. Her hard eyes glared.
“You had no power then, and you don’t now. For a time I wondered if you were real or if I’d made it all up, but when Elina told me of her dreams, I knew I hadn’t. We’ve waited for you, I wouldn’t leave her naive to you.” Sarah moved across the room, holding his attention as Elina slipped out of bed, her eyes intent and cruel.
Jareth narrowed his eyes, and pulling a crystal from the air twisted it into a coming horror, and as he was about to set it free, Sarah brought out a gilded cage from nearby.
Jareth paused. “All I ask is that you do as I say. I will take her-”
“No, you won’t.”
Elina caught hold of the crystal in his hand before Jareth could unleash it, and threw it at him. He turned as it smashed into fragments against him, his image shattering with it, and in the roar of sharp noise, he turned back into the owl.
He flew frantically around the room before heading to the window, but Sarah shut it before he could escape. Elina threw a blanket over him, pulling him down to the floor. He flapped violently, screeching.
And then he was in the cage, the little door shut firmly and locked.
“Say your right words,” Sarah mocked. “Now, mighty Goblin King, you are a pet. Enjoy him, Elina.”
The beauty that gazed at him through the bars smiled. The last fragments of his illusions and magic faded, glittering into dust, and there was just Elina in the dark.
He tilted his head.
“Don’t worry Jareth, just do as I say, and you will be free.”