Far from Equestria, there was another world, a dark world with a barren wasteland. The highest point was a mountain with a few creatures at the top. There were two human, teenage girls. One had blue hair with a ponytail and the other had purple hair with a double-ponytail.
"Gee," the blue-haired girl said. "Serena's taking quite a while. We got to get out of this world as soon as possible."
"Oh, really," the purple-haired girl asked with sarcasm. "Because I really love it here!"
"Seriously, Melody," the blue-haired girl asked. "I think this place is the worst."
"I think you're the worst, Carol," Melody snapped.
"Well, I think..." Carol spoke.
Suddenly, an orange, horse-like beast appeared from the sky. It landed on the ground and started to change its body. It became another teenage human girl. She had large, orange hair.
"Serena," Carol said. "Did you gather the magic?"
"'Cause you know that HE doesn't like mistakes," Melody said.
"I know," Serena said. "Trust me. I've already gotten enough we need to free him."
The three girls climbed to the very top of the mountain and approached a shadowed figure completely tied in chains. The girls knelt on one knee each and Serena lifted her hand. She opened it and a small rainbow light was in her palm.
"Master," Serena said, "Queen Scynder has failed. She didn't deliver much magic, but enough have found its way here. I'll just..."
"Stop," the figure hissed weakly. Serena was immediately petrified. "Do not waste the magic."
"What," Carol asked. "But I thought you needed it. Sometimes, I just want you to make up your mind."
"Sometimes, I want Carol to have a mind," Melody snapped.
"ENOUGH," the figure growled loudly. "Yes, I do need it to break the chains, but I need magic for two purposes: breaking me from these chains and opening a portal back to Equestria. This magic is only suitable for one. How could Scynder fail?"
"It was the work of the new Heroes of Harmony, master," Serena explained. "And they even convinced the fool, Anar D, to be their friend too."
"Aw, man," Carol exclaimed. "That guy was a lot of fun when he was evil."
"New Heroes of Harmony, huh," the creature asked. "Well, they'll be dealt with soon enough."
"But we can't escape to deal with them," Melody said. "We're still stuck here without an army."
"Let me take a closer look at that magic," the creature said.
Serena leaned in and brought the glowing rainbow light toward the shadow figure. The glow emitted a light that revealed the creature's red face, black eyes with yellow pupils, gray beard, and gray nose-ring. His horns helped shine the rainbow light across the rest of his body, which had red arms and claws and black horse legs.
"I may not be able to escape," the red centaur said, "But you can. I have a special mission for you, my Sirens."
Serena grinned and bowed with her fist and knee on the ground. "What is your command... Lord Arcanus?"