Based on a fic prompt in the YJ anon livejournal, prompt was Young Justice LARP (live action roleplay) as their mentors.

Like many rainy weekday afternoons, M'gann spent quiet hours in her room watching TV. Her eyes sparkled as she watched the humorous character interactions and amusing straits the people got into.

Today on "Hello Megan" there was a group of teenage boys (the nerds of the school) who engaged in something they called "LARPing". Apparently it involved dressing up in fantasy costumes and acting out fictional characters. Usually M'gann loved watching "Hello Megan" for the charming life of the main character, but today she was entranced by the dramatic fight scenes and epic storytelling the "LARPers" created. The episode ended and M'gann rolled onto her back looking up at the ceiling. She had to ask someone about this.

Robin and Kid Flash sat at the counter in the cave's kitchen; Wally busy covering five burritos in hot sauce, and Robin figuring out a sequence of code on his laptop. M'gann couldn't cover her eagerness when she floated in. "Robin! Wally! Have you ever heard of something called 'LARPing'? It's the most amazing thing; you wear fancy costumes and-"

She was cut off by Robin, who had an amused look on his face, "Geez Miss M, it's just roleplaying, delusional geeks do it at conventions all the time."

Wally smacked Robin lightly on the head "Ha, look who's talking, geek." He then turned to M'gann, "I'd roleplay with you any day, sweet cheeks."

"Really?" M'gann asked excitedly, "I'll call the team and let everyone know! This will be so fun!" She beamed and flew out of the room, leaving a disappointed Wally and a smirking Robin behind.

"Guess she wasn't thinking of a double act." Robin said casually without looking up from his work.

The team stood in a circle in the cave's training room. Superboy had nothing better to do at the time, and Robin had been dragged reluctantly away from his computer. Wally, always eager to please M'gann, came without complaint but kept trying to send winks in the martian's direction. Artemis and Kaldur had come via zeta-tube.

"What's LARPing?" Superboy asked, with his arms across his chest.

"Oh it'll be great Superboy, we can act out our favorite characters and tell amazing stories… I think it's usually outdoors or in a more diverse environment, but since it's raining outdoors I thought I could…" M'gann hesitated, wringing her hands. She remembered the last time they had connected into a mental simulation, and it had not gone well. "It's probably not a good idea actually…"

Surprisingly it was Robin who spoke up, "As long as it's not a train for failure simulation again I'm sure you can handle it." He gave a cocky half smile, which was strangely reassuring.

M'gann smiled back, "I was thinking I could construct a mental scenario and we could project our self-images into our consciousness as the roles we want to enact. It will be more realistic than wearing costumes outside."

Aqualad looked at her seriously. "We trust you, let's do it"

She smiled and closed her eyes while reaching out to their respective minds, connecting them within her own. In truth she had been thinking about this all day, collecting bits of worlds she had seen on television and in books, constructing various forms of a universe she wanted to visit. Outside, their physical bodies went slowly limp and sprawled out onto the floor.

Inside, M'gann shifted them through various scenes, as if showing a slideshow. She chatted excitedly while the sets shifted and the rest of the team stared around in awe, "I was thinking we could go to space, or to the wild west, or even to a cartoon world!"

"Woah Miss M, this is awesome, but howbout let's do something we actually know about… like… Kid Flash, runs at the speed of light without breaking a sweat!" Upon saying this, Wally almost instantly transformed into his superhero costume. Not expecting this, he yelped and stumbled backwards, bumping into Artemis. He got a "Real smooth, Kid Ego" from the archer.

M'gann clapped her hands together in delight, and suddenly the world around them became Central City, Missouri. "That's a great idea, why don't we role-play as the Justice League?" This earned some surprised looks from the team.

"I know who I'm gonna be." Kid Flash said, his costume becoming the red and very familiar Flash.

"No points for originality there." Artemis said sarcastically, but decided to follow suit and take on Green Arrow's costume, minus the goatee.

Aqualad smiled and also donned his mentor's outfit. "I am glad he is not here to see this."

Robin and Superboy looked at each other, both having different reasons for not wanting to be their older counterparts. M'gann looked at them both apologetically, "I'm sorry; we can change the setting if you want."

Superboy responded by morphing into the red and blue costume worn by Superman. "It's just pretend right?" He smiled. "And this way I can make fun of his costume." He smiled again, this time directed towards Robin.

Robin hesitated, then as if a mask fell over his face, suddenly snickered and was in Batman gear.

Miss Martian laughed and morphed into her uncle the Martian Manhunter. Then she realized that she was the only one who had the mental control to change her own body, and instead turned into a much shorter version of J'onn to match the rest of the "Justice League" in height.

"I will moderate." Miss Martian's voice was suddenly business-like "Today our mission is to stop the quest of a powerful sorcerer who wants to bring eternal darkness to the land."

Around them the world shifted into night in a deep city.

"Let's play."