You had no idea where you were.

You found yourself in a place you didn't recognise; a place that seemed similar to the Everfree Forest but was different in just as many ways.

One thing was for sure though. This wasn't real.

You weren't sure how you could tell, but you knew this was a dream. Whether it be that your last waking memory was of your bedroom in the library, or the mist was incredibly thick even for the Everfree Forest.

The trees stood tall around you, dwarfing even the tallest structures. The top of the trees weren't even visible to you, as the mist was incredibly strong.

But the worst of it all was that you couldn't move.

Firmly, you were locked in place, only able to turn around in circles to get a view of your surroundings. Not that it helped. You couldn't see more than a few feet in front of you anyway.
Even your wings refused to function.

The question remained, why were you dreaming of this. What had lead you to dream of some vague recreation of the Everfree Forest?

In the midst of your questioning, six bright lights appeared hovering before you. The lights were indistinguishable, almost blindingly bright when put against the dull background of the forest.

But as you eyes adjusted, you could make out what they were.

They were the elements.

The six elements of harmony hovered before you in all their colourful glory.

The dark purple gem, known as the element of generosity, was the first in the line, then followed by a familiar orange apple, known to be the element of honesty.
Next was a pink butterfly, which was evidently the element of kindness, followed by a blue balloon. This clearly belonged to Pinkie Pie, as it was the element of laughter.
Lastly, there was a large pinkish star, recognisable as Twilight Sparkle's element of magic, followed by Rainbow Dash's signature lightning bolt, the element of loyalty.

All six of those legendary elements hovered before you, but why? Why were the elements appearing before you, as if manifesting in a physical dream-like form.

The six elements began shifting, suddenly, the first three moving to the left, while the other three moved to the right. It was as if they were moving in formation, making room for something in the middle.

Suddenly, a seventh bright light burst intimacy existence in between the elements of harmony, this one glowing a bright yellow. It was as if a surge of electricity had erupted in the fabric of your dream.

Finally, manifesting out of the yellow light was...

A seventh element?

No. It couldn't be. There were only six elements, and there had ever only been six element. Right?

Hovering between the six original elements was a yellow inverted lightning bolt. It took the same shape as Rainbow's element, but this looked as if the lightning bolt had been reflected off the ground and was now striking back up at the sky.

In addition to it's yellow electrical colour, there seemed to be a black shadow-like boundary creeping in from around its edges.
But what this meant, you had no idea.

It was quite clearly a seventh element, but there was nothing left for another element to fulfill. The six elements alone had done an amazing job at maintaining harmony on their own.

This was just a dream, after all. In all honesty, there was much, much higher chance that this was simply a creation of your subconsciousness.

"You must be confused," a voice said from the fog. It was a voice you had never heard before, but it gave off a... familiar aura. Like you had heard it before but had simply forgotten.

"Well, yeah. There's a seventh element right there." you said, wondering how anypony could not be confused by that. You knew this was another one of your dreams, but like your other dreams, this felt real. Too real.

"Understandable. Allow me to explain," the voice said. It was a deep, foreboding voice, almost like that of King Sombra's. Was it King Sombra? Probably not.
Although the voice seemed similar, it was quite different to his.

"Wait! Could you tell me who you are first?" you asked, curious as to who this was talking to you. You swear you had met this 'pony' before, if it even was a pony talking to you, but you couldn't recall where from.

The voice let out a dark chuckle, still choosing not to reveal themselves.

"I'm afraid not. To show you my true form would be foolish of me," the voice explained. At this point, you had a feeling that the voice wasn't a force of good.

"Ok, just explain already," you demanded, the urge to escape this dream growing more and more by the second. Whatever it was talking to you gave you an unnerving feeling, like you shouldn't be around it for too long.

"Very well," the foreboding voice began, "There is a seventh element. There has always been a seventh element."

But there was no way. There was no possible way that there had always been a seventh element. The six elements that already existed functioned perfectly fine on their own.

"Impossible." was all you could say. You had watched the whole Friendship is Magic series many times over, and not once had there been any evidence at all of a seventh element.

"But it is possible. The only issue is that this final element has never been discovered. Not even the princesses know of its existence. Right know, we are the only ones that know of this element." it explained.

You still weren't sure whether this was real. After all, this was still only a dream.

"But this is a dream right? So none of this can't be real!" you exclaimed, frantically searching through the fog for the source of the voice.

"Oh, this is real, Storm. Now listen closely, I will only say this once. The fabric of this dream isn't strong enough to hold for much longer." the voice demanded, still maintaining its cover in the mist.

Attempting to speak, you let out a muffled squeak. Whatever the being was seemingly had just as much control over your dream as you did, if not more.

"Find the seventh element. You are the only one that can," it explained, the other six elements disappearing into the mist, "When you wake up, you won't remember any of this, but as long as you stay on this path, you will find it."

You weren't sure you would. You didn't even know what the secret element was, let alone finding it without any knowledge of its existence.

"Once you find it, we will meet again. And remember..." the voice said as your grip on the dream work began to weaken. You could feel the tug of the waking work pulling at your consciousness, "There is a storm coming."

Your stomach dropped. Chills shivered down your spine a smile those words were processed in your mind. That sentence has been said to you before.

"And you are the eye of it." turning around one last time, you got a good look into the fog. A menacing pair of glowing red eyes pierced your soul.

You knew who this was now. And you knew why its presence felt so familiar.

This was the same creature that had taken the form of Twilight and Rainbow Dash. The same creature who had somehow infiltrated your room that night.
But was the entity a friend or a foe? That question still remained, and it was quite likely that it would remain for some time.

As the dreamscape collapsed around you, pieces of the waking world began to intercept your vision. The memories of your dream began to fade out of existence as your bedroom in the Golden Oak Library began to fade into it.

Just like that, any trace of the event that had just unfolded had been wiped from your mind.

"Wh... What just happened?" you asked yourself, sitting up in your bed and staring out of the window over Ponyville. What faint light the moon provided illuminated the village in a cosy haze.

All you could remember was the fog. The endless mist that shrouded your mind, clouding your memory of the conversation you had just had.

"I guess I'm just tired..." you said to yourself, falling back down into your bed. Your wings also seemed to be strangely tense, as is something had just caused you to brace yourself.
But no matter how hard you tried, you couldn't remember what.

Nevertheless, Rainbow Dash had something big planned for you tomorrow. Or, at least that was what she called it.

Tomorrow is another day.

Author's Notes:

What should be the last in a series of short lore focused chapters is now out of the way. The next chapter should be back to normal length, if not longer.

I think it's pretty obvious who the seventh element belongs to, but I'll leave you alone to try and figure out what the element actually is