One of the many luxuries afforded to Jack upon his becoming an official Guardian, was the ability to travel between worlds. And there were literally thousands of them! Tens of thousands of realms and parallel worlds, scattered across the universe, just waiting for a touch of Frost.

And he planned to explore them all

North had shown him the Hall of Portals shortly after his initiation. It was in a hidden corridor, the door to which was in his office. He'd stated that every world needed the Guardians, even if they didn't all believe in them. Some worlds were a bit too far gone, filled with disbelief and cynicism. The only upside was that they didn't believe in Pitch, either. And he was trapped in his lair, dragged there by his own nightmares. He couldn't hurt anyone… for now, at least.

Jack wondered, silently, if he could help the people in the other worlds believe in them. After all, he'd gotten Jamie to believe, hadn't he? And as far as he knew, Pitch was unaware of the existence of other worlds. If he could help them believe in him, and his friends, they would have an advantage, and maybe, just maybe, they wouldn't lose their strength, if Pitch ever did come around again. Hell, it was worth a shot.

So, Jack waited until the others had dispersed, and North was fast asleep, before sneaking into the Hall of Portals.

There were so many to choose from. Where would he start? He strode past door after door, portal after portal, none of them really capturing his interest. In the end, he supposed he'd just have to pick one at random, and see where it led. Then, about halfway down the Hall, he stopped, eyes fixed on one particular door.

It wasn't very large, barely big enough for him to walk through without ducking. It seemed to be made of wood, a light grain, with an intricate, gilded design carved into the face, and an ornate, old-fashioned brass doorknob. It looked like something out of a fairytale. He glanced up at the label over the door. "Vuldania," he read aloud, smirking at the name. Sounded like something North would make up. For all he knew, he had.

His attention was then drawn to an old, worn paper, posted just to the left of the door. Stepping closer, he read:

Home to the 4 Kingdoms:
Andalasia
Arendelle
Corona
Wonderland

Yep, he thought, definitely out of a fairytale. Jack nearly scoffed and turned away, but his eyes lingered on the second kingdom. Arendelle. Something about that name, something about all of it, beckoned him closer, as if chanting in his mind, "Come, Jack. Come and see."

Jack put his hand on the doorknob…

A/N: Aaaaaaand yep, that's where I'm ending it! Sorry, but not really. Gotta wait until the next chapter! I know, I'm wicked. So sue me. Actually, don't. I can't afford it. Ahem. Anyways, what do you think? This is my first attempt at a crossover fic! Yay for branching out! This is also my first foray into the "Jelsa" ship. I was recently converted, and I'm kind of obsessed, but it's actually surprisingly hard to find Jelsa stories. Well, no, there are quite a few, but most of them are alternate universe, modern-day, high-school drama stories. That, or they're really dark and depressing. Not my style. So, rather than waste time on a fruitless search, I thought, "Well heck, why don't I just write a Jelsa fic?" And boom! This chapter was born. Anyhow, I'm rambling. Please, please, PLEASE review!