The Pyro and The Engineer's Misadventures in Equestria

If you have watched the Season 2 finale, then you probably heard of the Crystal Caves. They are large caves made of crystals(obviously) that block unicorn magic from ever reaching in and out of it. They were used to imprison ponies who broke rules of Equestria, but later became a place where the changeling queen traps anybody who dares to interrupt her plans. And it doesn't helps that the whole place is a maze. Anyways, into the story.

"Ugh. Now, where are we?", asked Dash as she got up.

"I don't know, but this cave is filled with SO MANY CRYSTALS!", Rarity spoke as she ran to a crystal shard.

"Hang on...cave? Crystals? Crystal Caves!", Twilight said.

"Uh, Crystal Caves?", the other four asked.

"It's where Chrysalis trapped both me and Cadence in the royal wedding last month!", Twilight explained.

"Ooh.", the others replied.

"This place blocks unicorn magic from reaching outside, so we need to find our way out manually.", she continued as she trotted away.

"Do you have any idea of what she said?", Dash asked. The other three shook their heads, before following Twilight.

The five walked for a couple of minutes on the caves, eventually reaching a pit.

"How will we cross that pit? I mean, Rainbow and Fluttershy can just fly over it, and Twilight can teleport over it, but neither me and Pinkie can fly nor teleport.", Rarity asked.

"Mmm....ah! Dash can carry Pinkie, and Fluttershy can carry you. I can teleport myself to the other side.", Twilight answered.

"I don't think I can handle carrying somepony else. Not that I cannot try, though.", Fluttershy replied.

Dash picked up Pinkie and Fluttershy picked up Rarity, and flied out over the gap. Twilight simply used her teleportation spell to teleport to the other side. They ended up on a minecart trail with five conviently-placed minecarts.

"Wow, just our luck.", Dash commented as the five jumped on the minecarts and rode down the spiral trail, with Fluttershy panicking of the speed.

The minecart trail ended in a ramp, causing the minecarts to be sent flying up ahead, eventually crash-landing on a clearing.

"Ouch.....hang on...There! I see the way out!", Twilight said as she looked towards a steep cliff with an opening on it's top. Bright light could be seen outside.

"Not so fast, now.", a voice boomed. The five looked around. Eventually, reflexes of the changeling queen appeared randomly on the crystals.

"What do you want?", Twilight asked.

"What I want? Oh, Discord offered me to help him in his job, on which I should capture you five, and prevent you from escaping, and in return, he lets me to control Canterlot at my will!", Chrysalis explained.

"Yeah, right. We are escaping out right now! Plus, even if you stop us from escaping, eventually, hardhat will recover, then him and Applejack will put a stop in your plan!", Dash replied.

"Hah hah hah! Oh, you make me laugh! He also told me to retrieve the soul that transformed your precious night princess into the horrendous creature you have beaten. Nightmare Moon. I'm going to release it, so it can host itself on the princess again. Then, it will do it's job, of slowly killing your human friend. Once he is dead, your farm friend will break into tears. And that's where Discord enters in again. Because she will be too sad, he will corrupt her just like that time when he corrupted you all. Without her, you won't be able to stop us. And, when Pyro's poison effect shorts out, us four will anniquilate him, and banish him back to his puny world of people who think that killing each other is the only solution to their problems!", the changeling queen continued. "And, now that I have you gathered around here, I'll see as you five have some 'fun' with my minions!", she continued. She whistled, and on cue, hundreads of changelings arrived on the exit of the caves. They started running towards the five as Chrysalis laughed evilly.

"C'mon, we did this a month earlier, this time it's nothing different! Let's do this!", Twilight said as she and her friends proceeded to fight the changelings. Like the other time, they all transformed into random versions of the five ponies. They took care not to accidentally attack their real selves as they attacked their impostors.

"What? You managed to beat all of them?", Chrysalis said in shock.

"Your puny army is nothing against us!", Dash replied.

"Whatever. You still cannot reach me quick enough before I release Nightmare Moon. You're still doomed. Aww, what's with the angry face of yours? I know what will cheer you up -- a little fun with Über Pyro!", she continued. Her reflex disappeared as rumbling was heard, followed by crystal breaking noises. Loud footsteps were heard. The sound's origin became identified because the giant Pyro came from the opening, breaking crystals on the way. Well, fighting Über Pyro was not going to be easy at all.

TO BE CONTINUED...