Disclaimer: I do not own anything from the Harry Potter, Fullmetal Alchemist or Naruto worlds.
Note: The start of the story takes place the summer before Harry's 7th year, Ed and Al's return to East City and the second leg of the Chuunin Exam, where they're in the forest of death.
It was a sunny mid-August noon. Three 17-year-olds shouldering huge backpacks stood in a dusty old attic. They were admiring a large circle the had drawn on the floor. The circle was about three meters in diameter, and filled with mysterious symbols and runes. They had researched away all of July before they had come across this handy bit of magic. They had spent the last two weeks perfecting every little stroke of every little rune in the circle. Now it was finished. The fruit of their labour.
"It doesn't look that special." The tallest of the group, a boy with freckles and red hair named Roy Weasley made a face.
"Well it is. So shut up." The only girl, a brunette named Hermione Granger snapped.
"What do we do now?" A black-haired boy with glasses and a lightening-bolt shaped scar on his head asked.
"Well, we just step into the circle, say the spell I taught you, think about Voldemort's horcrux and presto! We're there!" Hermione looked pleased at herself for finding the spell. "We should go after the locket first, because we know what it looks like."
"Well, I can't wait any longer." Harry stepped into the circle. "You guys don't have to come..."
"Don't be ridiculous mate, we're you best friends." Ron stepped into the circle with him.
"Besides, it only works with four or more people." Hermione read off the textbook she had found the spell in. Her eyes widened as she realized the step she'd just missed. Hermione swore. "How could I miss it! Four or more people! Four or more!"
Just then, a blonde girl one year their junior wandered into the attic.
"Mrs. Weasley says lunch is ready." she announced. She was known as Luna Lovegood, and her eyes widened (even more then they already were) when she saw the circle. "Oh! Is that a Transportation Circle?"
"Um... no?"
"Of course it is! My mum loved them! She taught me all about them! Are you going to go looking for Voldemort? Can I come? I always wanted to travel in one! Let's go!" With that, she joined Harry and Ron in the circle.
"We've got a fourth." Ron shrugged. Hermione sighed, and entered the circle. Facing each other, they all took out the wands and held hands. Lifting their arms into the air, they yelled the spell.
The circle began to glow magenta, and a gentle wind swooped out of nowhere.
Harry started out thinking about the horcrux, but his mind wandered to the subject of Voldemort himself. He remembered when he had faced him in his fourth year. He remembered the Death Eaters, all in a circle, surrounding him. They were all in their black uniforms, and all sneered at him. Harry wandered if that was going to happen again.
Luna's arrival reminded Ron of the fact that he'd had nothing to eat since dawn. He mentally kicked himself when he realized that it was the day of Bill and Fleur's wedding. It was a beautiful day, and a nice, big lunch out in the bright sunshine was just what Ron needed. Ron's stomach rumbled as he imagined all the good things his mother must've prepared. Not that it mattered that much. Ron was so hungry he could eat a dog!
The wind strengthened, turning into a small tornado exclusive to the circle. Their sight of anything else but each other was obstructed. Hermione felt like her arms were going to rip off. She wandered if they'd done the spell right. What if they hadn't? What if they were dismembered because they hadn't? With a nasty feeling, Hermione imagined her arm and leg ripping away from her and swirling into the eye of the storm. She shuddered even more, picturing herself with prosthetics, facing the mangled bodies of her friends, heaped in the middle of the circle.
Luna was thinking of the dancing armour Mr. Weasley had hired. Fred and George had set them fighting against each other when Mrs. Weasley sent her inside to fetch the Golden Trio.
It was the nature of the spell to put together the thoughts of all the castors and send them to a place that as closely matched all of it as possible. There was only one placed that matched Ron, Harry, Hermione and Luna's thoughts. Of course, it was a place in another world. A world usually only accessible by a certain gate...