Twilight lit her horn and took the human like changeling's throat in her grasp, and said, "Everyone, out. Now." The rage in her voice made it obvious she didn't want to argue, and the Eclispes, Opal, and Celestia, as well as the Lunar Knights, left, leaving Twilight and Green Mist alone.

"Now," Twilight said, green mist with a lower case "g" and "m" began to come from her eyes. "How do you know Plasma?"

Still getting strangled, Green Mist chocked out, "Be-because he sent me here."

"And just who are you to him? And where are you from?" Twilight growled, lessening her grip.

"I was his top lieutenant, his zealot, until he was killed by one of descendants. His last command to me was to gain allies to strike back, and he gave the ability walk between dimensions. I've been in only one other besides this and my home, and it is where I came from."

Twilight eyes Green Mist. "And how do I know this isn't a trick?"

"You have the Element of Dark Magic, and I the Element of Deceit, Plasma's Elements . We must stick together to defeat Harmony's Elements, especially considering they are more numerous and the one who killed Plasma is the bearer of one of them."

"You said it yourself, Green Mist," Twilight said. "You're the Element of deceit. Other ponies may be trusting to the point of stupidity, but not me. Unless you give me a reason to believe you, I'll crush your throat slowly, more so then I did to an old friend of mine a year ago."

"Well, I know you wish to find a way to your equivalent of the human world with your powers intact," Green Mist said, "and I know of a way for that, as well as to be able to blend in with them."

Twilight raised an eyebrow. "And how could you do that?

As much as he could, the changeling chuckled. "Because I learned that spell during my time in the last dimension," he said, lighting his horn, with his name sake surrounding him before dissipating, a changeling with a green carapace where he once stood. "It allows me to change my form at will," Green Mist said.

"Plus, I used it to great effect with my powers still being active," he said. "So? Do you still wish to kill me, or do we have an alliance?"

Twilight thought about it before saying, "Yes, but if I so much as even get a suspicion that you're planning on betraying me or the others, I'll make you wish I had slowly crushed your body, leaving nothing but a bloody mess." She yanked Green Mist to her face. "Do I make my self clear?"

"Crystal," Green Mist said, returning to his hybrid form.

"Good," Twilight said as she got up and left the room. "I'll meet you back here in an hour with the others we'll bring with us." Se then left the room.

Once she had left and he was certain no one was listening, Green Mist let out a cliched villain laugh. "Too easy," he said. "Even more so then those Guardians, and I started from scratch with those idiots. I simply need to ensure Lone Shadow doesn't find out I'm here before I can succeed, even if it would take him a while to get here." He then reached out quickly with his left arm and tightened his hand, causing it to encircle something, even though it looked like he was grabbing thin air. "Hello, Discord."

The air shimmered, and there appeared the god of chaos, Green Mist's hand around his throat, and the spell he had cast during his transformation preventing Discord from teleporting. "I guess we should have figured you'd still be following Plasma, huh? How'd you sense me, anyway," he said in an unusually serious tone.

"You forget, Plasma gave me many of my powers, including being able to tell when some one is spying on me. I'm surprised Twilight hasn't come after you," Green Mist said.

Discord chuckled. "Oh, she did, but I do have a hiding spot not even Celestia knows about. You do realize that, if you kill me, they will know you're here, and I could just tell them you're here? You're going to be discovered."

"Oh, I do," Green Mist said. "This isn't my second stop, after all," he said, opening a portal. "Have fun," he said before pushing Discord through it. A second, whose colors were much darker, came through.

"What do you require of me, Master," it said.

"Keep false reports flowing," Green Mist said. "I don't want to risk Harmony or her allies discovering me before I'm ready."

The duplicate Discord nodded, then disappeared. "Now, then," Green Mist said as he sat upon Twilight's throne, a smug smile on his face. "Who should I brainwash first?"

As he contemplated this, in the shadows was a particular female changeling with a bright pink carapace.

"This is bad," Pinkie said before she disappeared in a flash, which Green mist noticed.

He only scoffed. "You'll need to get here quickly, Lone, to stop me, and my plan to avenge Plasma and his brother," he said, a smug smile on his face as he summoned a sword that seemed to be made of bone, and had an emerald sheen to the edge. "And you'll need everyone.

"Including dear Chrysalis and her daughters," Green Mist said before letting loose a small chuckle.

Author's Notes:

Ten points to the first one to spot the reference, and the clue to the sequel to my story, When Worlds Collide, which is also a prequel to this one, in a way.