In Equestria, where all was happy, Twilight Sparkle was testing out alicorn magic with her friends watching to see the spells she was capable of casting. Except Spike, because he was making sandwiches and lemonade for everyone. As Twilight casted spells, she eventually let her friends suggest spell ideas, and since she had an almost infinite power supply due to her being an alicorn, she could do a limitless amount of things. For example, she could make it rain ice cream, summon a Daedra, or even open inter-dimensional gateways to places in danger that pull in everyone in the area whether they like it or not and seal up after everyone gets spit out of the portal. Wait? I wasn't supposed to say that yet? Oh... uh... or create sandwiches out of thin air! Hehehehehehe...
After about an hour of letting her friends suggest ideas, they started throwing ideas around without thinking of the consequences.
"Can ya'll make some sort of new-fangled farmin' tool?" Applejack asked.
"No, because if I did make something like that, it would more than likely be dangerous." she said frantically as she started pacing around. "On top of that, nobody would know how to use it, meaning someone could potentially become injured or killed! I don't want someone to get seriously injured or killed! I can't let it happen! They'll hunt me down and send me back to Magic Kindergarten for sure!"
"Okay, calm yourself down. We won't force ya to cast the spell. Any other ideas?" Applejack asked. Basically, situations like that continued happening for the next half hour or so. Then, Spike brought up some sandwiches and lemonade for the group. Suddenly, something extremely important happened. It was tragic! It was terrible! Spike forgot to put mayonnaise on Rarity's sandwich! It was the- oh yay! Problem solved. Hooray for alicorn magic! The group ate their sandwiches in silence for the next 5 minutes.
After they ate, the group made more ideas, but quieter than before, because they were near Spike, who had decided to take a nap.
"You should make a portal to a dimension in need of help so we can go on an awesome adventure!" Rainbow suggested.
"NOOOOOO! It could send monsters to here which'll be my fault and then they'll hunt me down and send me back to Magic Kindergarten!" Twilight yelled, surprising everyone not by the outburst, but by the fact that she didn't wake Spike up.
"Twilight, who do you mean by 'they' when you say that?" Applejack asked.
"The government." Twilight answered, her voice almost a whisper. "They're the number one thing to call 'them'. Number two is the Hive, and I don't mean the Hive ruled by Crota on the Moon, I mean the Hive in Dreamland, and Number three is changelings."
"Could you do a special portal that brings us in and out only? Like a one-way portal?" Dash asked, still not giving up on the adventure idea.
"That could work without any harm, I just need to test it." Twilight said. With a flash of magical light from her horn, a testing area was made for the portal, which was a glass case with a rock to test on inside. However when Twilight made the portal, it was stronger than expected. It pulled the rock in, but also the glass case, and eventually Twilight, Dash, Applejack, Rarity, Fluttershy, and even Spike (who was awoken) got sucked into the portal. Pinkie somehow got pushed away from the portal, which closed up before she could do anything. However, when the 5 ponies and Spike reached their destination, Pinkie appeared in a cloud of smoke. Nobody questioned it. It was Pinkie.
As the group looked around, they realized that they were on giant floating vines. These vines wrapped around one another, making a system that could be used to travel around on, if one had the skill to do so. The group saw a castle below them, and decided to use the three ponies with wings to glide down slowly and safely while carrying the ponies and dragon without wings.
When they reached the castle, it seemed mostly unguarded, but they peeked inside and saw some unfriendly-looking guards. They all snuck inside and hid behind a pillar for a while, and within a few minutes, a hovering creature with 6 floating hands followed by a pink puffball who didn't seem to be with him but was following him entered, and you should know the rest.