Chapter Text
"Harry!"
"Harry!" the small, squeaky voice hissed.
Harry groaned and rolled over in bed, pulling the covers over his head.
"Go away, Percy," he mumbled, voice thick with sleep. "Go back to sleep."
"I can't," Percival whined, crawling on Harry's bed. "The sky 's awake, so I'm awake, too!"
Harry opened an eye a crack and noticed the glow of the Aurora Borealis outside his window. Swirls of luminous green snaked across the sky, fading into purple and bright blue as the ribbons of light painted the night sky.
"I want to sleep, Percy. Just go back to bed."
"But I want to play! Pleasepleasepleeease, Harry!"
"NO!" Harry gave Percival a big shove and sent him rolling off the bed.
Percival pouted as he sat on the floor after landing on his bum. Then, an idea came to him. A small, sly smile spread across his face.
"Har, do you wanna build a snowman?"
***
How the hell was Percy so persuasive? Harry thought as he let himself get dragged down the hall to the big ballroom. Percy threw the doors open and practically danced inside, his grip on Harry's hand never loosening.
"Do the magic, do the magic!" Percy squealed, clapping his hands excitedly and bouncing from one foot to the other.
Harry couldn't help but smile with a slight roll of his eyes as he felt the familiar coolness of the ice magic zip down his nerves, toward his hands, and materializing in a growing ball of blue light between his hands. Percy's face lit up as he watched the ball grow larger and larger until Harry threw his hands up and released the ball. It burst into a thousand tiny sparks of blue-white light just before it it the ceiling and floated down, covering the entire room with snow.
Percy squealed again as the snowflakes drifted down around them. Harry just smiled and stamped his foot on the ground, sending out a shockwave of ice magic that glazed over the floor of the entire ballroom with a thin layer of ice. Percy's eyes widened impossibly further as he slid across the floor, a wide gin splitting his face open. Harry smiled back, skated effortlessly over, and offered his hand for his younger brother to take.
It wasn't long before they were kneeling in a massive snowdrift, patting a snowman into shape after having chased each other around their makeshift ice-skating rink, thrown snowballs at each other in an all-out battle, and made countless snow angels in the mounds of snow all over the room. Harry stepped between the snowman and Percy to hide what he was doing. Percy craned his neck around to try and catch a glimpse, but Harry sidestepped to block his view once again. When Harry steped away, there was a (slightly) misshapen snowman sitting in front of them, complete with a pebbly smile, stick arms, and a carrot nose.
Percy's face cracked wide open with a massive smile. Harry couldn't help but smile along with him. He continued to smile as Percy jumped off the snowdrift with a squeal of "catch me, Harry!"
Harry shot a bolt of magic at the spot where Percy was due to land, creating a small column of snow on which Percy landed on instead of the cold, hard ice. The game continued well for about 3 more jumps or so, but Percy kept going faster and faster.
"Percy, slow down!" Harry warned, darting forward, but it was too late. Percy's foot slipped, and he fell toward the ground with a scream. Harry was going to create another mound of snow to cushion his fall, but his foot slipped as well, and instead of hitting the floor, the bolt of ice hit Percy's head, and he fell sideways to the floor.
Harry's eyes widened in horror, and he scrambled to regain his footing. A small lock of Percival's hair turned a silvery white as he lay motionless on the ground. Harry ran to his brother's side and shook him.
"Percy? Percy, wake up!" Harry sobbed, shaking his brother harder. No response.
"MUM, DAD! COME QUICKLY!" He wailed, clutching Percy to his chest. He was cold, so very cold. So was the air in the room as the soft, fluffy snow turned to cold, hard ice. The snowman in the corner fell over as Harry's desperation spread throughout the room, transforming their winter playground into a cavern of ice.
Harry's parents burst through the door and dashed to where Harry was bent over the tiny figure of his brother in the middle of the room.
"Harry! What have you done?" His father cried as he crossed the space between them with a few long strides.
"It was an accident! We were just playing, but I didn't mean to hit his head!" Harry protested as his mother took Percy from his arms.
His father laid a hand on Percy's forehead, and Harry watched with wide eyes as his father's face morphed into a mask of horror and disbelief.
"He's so cold. We need to get help, now." He nodded to his wife, and she dashed out of the room with Percy. He beckoned for Harry to follow him, and the ran down to the stables together. Harry watched as his father saddled the horses.
"Where are we going?"
"There is a magician im the forest called Merlin. He'll know how to save your brother."
"Will Percy be ok?"
"I don't know, Harry. I don't know."
***
This was the spot, apparently. A small clearing in the forest marked out by a circle of large rocks.
"Hello? Merlin?" Harry's father called. "I am King Arthur of Arendelle. I need your help. Please."
Suddenly, there was a flash of bright light, and out of it stepped a tall man in a long robe.
"What do you wish to consult me on?" He asked.
"My son needs help." Harry's mother held out her unconscious boy.
A look of concern passed over Merlin's face as he examined Percy.
"He has been hit with ice magic. Thankfully, only his head was hit. That, I can fix." Merlin waved a hand over Percy, and the warmth returned to his body, but the white streak remained in his hair.
"If it had been his heart," Merlin continued,"I would not have been able to save him. Only true love can melt a frozen heart."
"Will he be ok?" Harry asked softly.
A crease appeared between Merlin's eyebrows. "Is he the one that did this?" He asked.
"Yes, why?"
Merlin bent down to address the boy. "Your abilities may be a gift, but they can also be a curse. Be careful with your power, my boy, lest your demons consume you whole. Your power is controlled by your emotions, so you must learn to control them instead of having them control you. If you hit anyone in their heart, I shall not be able to save them." And with those ominous words, the sorcerer vanished, leaving behind a very scared and confused little boy and his parents.