Jim is six in this chapter.

"I want to go home."

Jim's demand fell flat against the stone walls and dusty shelves of the room. The man who claimed he was Merlin didn't respond; he just kept scribbling away on his roll of yellowed paper. Every once in a while he would glance at one of the many books on the table. Jim wasn't sure if he was ignoring him or had just not heard.

"I'm leaving," Jim announced.

No response. Jim carefully started moving toward the ornate wooden door that he was fairly certain led outside. "Merlin" was still scribbling away. He put his hand on doorknob, it was cold. He glanced back. Still nothing. Jim's heart was beating fast as he eased open the door and slipped through.

He closed it quickly behind him and squirmed excitedly. He was out! It was far easier than he had expected.

He looked around trying to figure out where he was. The door was on one side of him and on the other was a dark tunnel, lit in places by glowing green stones. Jim eyed them with wide eyes.

Toby would have liked them. Jim had met him a year ago just before his birthday and they were now best friends. He had even shown Jim his special rock collection. Jim drifted toward one of the low-hanging green crystals but stopped. Mom said stealing wasn't good.

He was already being bad by disobeying an grown-up and running away.

Jim frowned, hesitating by the door; he really shouldn't be doing this, but he didn't think Merlin was a good person. Mom had warned him that there were bad people and that he shouldn't go with them or do what they said. Though he wasn't sure if that applied in this situation since he hadn't gone with Merlin: he had just woken up here... What if Mom had left him with Merlin like she used to with Gramma sometimes?

But she always told him when she was going to that. And she always said goodbye. Not like Dad…

He shook his head hard to get rid of that thought before turning away from the door. Mom wouldn't abandon him and he didn't want to be here anymore. He would find his way home. If he was wrong Mom would forgive him.

The tunnel was dark and cold. Every once in a while it would spit in two. The growing crystals stopped being interesting and cool and started feeling creepy. Their eerie light bothered his eyes. Jim found himself getting more and more confused. He wasn't even sure how to get back to the door. He let out a quiet whimper.

Maybe if he went just a little farther…

He rounded the corner and found himself in front of a very familiar door. He was back where he started.

Jim frowned. That was strange…

He decided to try again. And again. And again…

When Jim found himself at the wooden door yet again, he felt his face crumple. He sniffed a few times and a tear trickled down his cheek. What was he doing wrong? Frustrated and lonely, he curled up beside the door and started crying.

He had been there for a while, and was starting to get cold, when the door opened. Warm yellow light spilled out, partially blocked by a tall silhouette. He peeked out from behind his hands to see Merlin staring down at him.

"Come back inside, boy. If you stay out in the caves you'll catch cold."

Jim glared up at him for a moment. A shiver ran through him, causing him to wrap his arms around his skinny frame. Despite that he refused to get up. He didn't want to go back there, he wanted to go home.

He didn't get much of a choice. He let out a yelp as he was lifted up and carried, struggling, back inside.

Once they were back in, and the door was closed, Merlin wrapped him in a large thick blanket, set him in a chair, and handed him a cup of something warm. Coco he realized. He held it in his hands but didn't drink it, choosing instead to glare at Merlin as the man settled into the chair across from him.

"How long will I be here?" Jim asked.

No response.

"Why am I here?"

"I told you: I'm training you."

"Why?" Jim asked, frustrated.

He had said something like that when Jim had first woken up here. That Jim had an important destiny that he had to prepare him for.

But Jim knew training was like teaching. He went to school for teaching and they let him go home each day. The teacher, Miss Crumbstead, didn't ignore him either. She answered his questions and would give him and the other kids fun things to play with and draw. Merlin didn't do any of these things.

He didn't think Merlin was going to answer but to his surprise the old man looked up. He set down his pen and put his hands together in front of him. Jim straightened uncomfortably under his gaze.

"I wanted to wait a while longer to talk to you about this but I suppose you need some explanation before you can settle in."

His blue-grey eyes were intense as he studied Jim carefully before he sighed and a tired sort of look formed on his face, like the one Mom had when she had told Jim Dad wouldn't be coming home for Thanksgiving. He rose from his chair and went over to one of the shelves, shuffling around for a moment, before he came back and set a small yellow crystal down between them.

"There is great evil in this world," Merlin started.

He rested his hand on the crystal and it flickered and released blast of yellow light. Jim shielded his eyes. When he put his hand down, he saw that the light was forming into shapes: huge beings with horns and armor and fangs. He ducked down behind the back of his chair, watching them fearfully.

"One such evil took the form of the Gumm-Gumms. They were a vicious group of trolls that ate humans and wreaked havoc… hurt other trolls that didn't agree with them."

Jim covered his eyes, shaking. He didn't want to see this.

"In order to protect the humans and drive them back. I created a magical amulet that would choose a champion and gift them with great power."

Jim peeked through his fingers and saw the image had shifted to a different, less scary, one of the horned creatures. It held a glowing disk in its hands. Its lips moved as if it was saying something and a suit of armor materialized around it.

"Thus started the line of Trollhunters," Merlin said, a slight smile briefly appearing on his face.

He circled around the table to stand beside Jim and set a hand on his shoulder. Jim shifted uncomfortably but let it stay as he watched the images fade away.

"But what… why am I here?"

"You are destined to be the next Trollhunter," Merlin stated.

Jim turned around to stare at him in surprise.

"Me?" He squeaked.

Merlin nodded.

"Indeed." He took a step away, clasping his hands behind his back and turning away from Jim. "I saw it in a vision. You were able to finally defeat two of the greatest evils the world has known."

He paused.

"Or rather will. But not before damage was done."

He set another crystal next to the yellow one, a blue one this time. He tapped them together and whispered words that Jim couldn't understand.

They flared for a moment and then cast out a red light. Jim jumped as the shapes of the Gumm-Gumms reformed. This time in Arcadia! There were people fleeing for their lives. Destruction and chaos was everywhere. Jim's breathing quickened to the point he was rapidly becoming light headed.

Merlin picked up crystals and the image vanished. Jim stared up at him with wide eyes. The wizard's expression was solemn. He knelt down to Jim's level.

"That is why I brought you here," He said gently, holding Jim's gaze with his own. "To start training you early so this time when the time comes you will be ready to do what you need to."

"C… Can't.. Couldn't someone else do it? I… I'm not big or strong… or… or…"

Merlin shook his head.

"I've studied many futures," He said firmly.

His hand brushed over the crystal again. Images flickered by quicker than Jim could truly take them in, but slow enough that he could see the destruction and devastation.

"…You must be the Trollhunter, it is the only way."

Jim was quivering. He started to wrap his arms around himself, but Merlin gently pulled them back down.

"But what about Mom?" He whimpered.

He couldn't leave her. He didn't want to, but especially not after seeing how badly it had hurt her when Dad left had left them.

"Can't she stay here too?"

Merlin sighed and looked away.

"I'm afraid not," He said. "Being Trollhunter is dangerous. If your enemies know who you care about they will try to hurt them. Do you really want to bring her into that?"

Jim thought about the evil man-eating trolls and shook his head weakly. He didn't want Mom to get hurt. Before he could say anything else, Merlin continued.

"You can see her eventually, once you're strong enough, but for now I need you to focus on your training. Will you do that?"

Jim hesitated, this was big and scary, but if he didn't…

"Okay."

Merlin smiled and patted his head.

"I knew you would make the right decision."

Author Notes:

The next chapter will be Barbara's first interaction with Morgana. I was going to have it be part of this chapter, but it was being stubborn and I'm impatient. There's also a time jump, so I think it probably works better this way.

Also writing from a kid's perspective is tricky and I would welcome any critiques.

This story will be alternating between the past and present (events that will be taking place after Jim and Barbara's interactions in the first chapter) I will be showing that with tenses. Events happening in the present will be chronological, while events in the past will jump around a bit. It's a bit of a style experiment for me so I'd love to hear what you think.