"So.. If Starswirl's book is correct, The Cave of Flame should be right around here,"
"Are you sure?"
"Yes..?"
"Why do you seem uncertain?".
"Well, um.. it seems he didn't write exactly where it might be..".
Luna shot her a frown.
"So Starswirl isn't the best writer ever.."
"Ugh,"
The book Starswirl wrote was filled with all of his adventures to the many secret lands of Equestria waiting to be discovered. He gave it to Celestia a long time ago after the banishment of Nightmare Moon and told her to try and check out all the places he discovered before he vanished from Equestria. Until now, nopony knows whatever happened to him, so visiting the Cave of Flame, which was Starswirl's favorite place according to the book, is very important the her.
"But we made it all the way here.. it shouldn't hurt to try and explore!". Celestia exclaimed, trying to stay positive.
"You owe me a lot of cake when we get home, sister".
_____________________________________________________________________________________________________________________________________
The forest was thick, too thick for the two sisters to navigate.
“Are you sure nothing in there says anything on how to find it?”.
”I’m sure we can find it, it only says the cave gives out a crimson-red glow that can be seen when we get a little closer to the cave”.
"A crimson-red glow?"
"Yes, it is a result of the many magical red crystals glowing from the depths of the cave, *sigh* if only Starswirl explained how to get there, I want to see it as soon as possible!".
The young one sighed, tired from all the walking.
“I thought we’d go somewhere else other than a lame cave”.
“Pshh, what are you talking about Luna? It’s not lame, the book said that the crystals could be a source of power to certain alicorns”.
“And is it the good kind of power or the bad kind?”.
“I… um… don’t really know”
Celestia gave a sheepish smile. Luna rolled her eyes.
They continued walking and finally spotted a faint crimson-red glow.
“Told you”.
They quickly approached the glow and saw an alluring enormous cave filled with red crystals.
“It’s, amazing”.
They both looked at it with awe.
“Come my sister, let’s go”.
_____________________________________________________________________________________________________________________________________
“Just watch your step, they may be dangerous”. Luna exclaimed.
“How can something like this be dangerous?”
"Just, making sure".
Celestia mysteriously felt powerful here. It was like she was 'connected' to the cave somehow, as if they shared a bond. She never felt like anything like that before. It felt… Great.
A certain crystal caught Celestia’s eye.
”Look at this one!”.
Luna turned to her sister,
”It looks exactly the same as the other crystals” She said, in a blank tone.
Celestia pulled the tiny crystal out of the rock with her magic, “I’m going to keep this”.
”But what if it’s dangerous? You can’t just bring that home!
”But why?”.
Luna groaned, “You don’t get it, what if it’s.. Well, the point is, you can never expect something you just pulled out of some random cave to be perfectly safe!”.
Celestia scoffed at her.
“I will take care of it”.
Luna reluctantly agreed, she looked closer at the crystal and observed a fire pattern on it. She picked it up with her magic to have a closer look. Before she could do anything Celestia’s magic took over and she snatched it from her sister.
”IT’S MINE!!” she yelled, in a very juvenile manner and ran to a corner of the cave.
_____________________________________________________________________________________________________________________________________
An awkward silence fell upon the cave. One pony sitting in the corner, and another standing there in confusion. As if Celestia wouldn’t move from that spot unless somepony said so.
“Celie?”, Luna piped up, breaking the silence.
She didn’t reply.
“Hello? Equestria to Celestia?”.
Nothing either.
“CELESTIA???!”.
This time it caught the alicorn’s attention,
“WHAT?!"She exclaimed
Luna stood there in silence. That response could probably be heard all the way from here to Canterlot.
"Did you know I was in the middle of something IMPORTANT?!” She continued, acting very annoyed.
Luna decided to defend herself,“You call sitting in a corner and doing nothing important?”.
“I was observing the CRYSTAL!”.
Luna stood there for a second, then turned around.
”Well, I guess that is important”, She replied sarcastically.
She started walking to the exit of the cave,
"Where are you going?"
"Back to Canterlot..?"
"Already?"
"Yes.. We do have duties to do, Celestia. We can't just stay here for the rest of the day".
"Can't we just stay here a little longer?"
“Let’s just head home”, Luna replied in a very stern tone.
"Ugh! Why must we be princesses anyway?!", She whined.
Then, Luna flew out of the cave and Celestia reluctantly followed.
As they flew out of the forest, Celestia spoke up.
“Just so you know, Luna. You can NOT touch this crystal. EVER.”.
Luna rolled her eyes at her.
She was surprised that her sister's attitude became very temperamental, and decided to question her.
"Why are you acting like this?",She asked worriedly.
"Acting like what?"
"Oh, I don't know, acting VERY obsessive?! and being easily ticked off-"
"Oh, I don't know what you're talking about. Maybe you're just jealous that I have a magical crystal with me and you don't! Go grab one for yourself, can't you?"
"I'm not!- ugh, nevermind. Just stay quiet for pony's sake!".
"Hmph!", Celestia exclaimed and started to fly faster, cutting Luna's path.
Luna decided to catch up with her.
"You know, if there's something wrong, you can tell me," She said in a more relaxed tone.
"Nothing's wrong with me! Something is definitely wrong with YOU!". She exclaimed and flew even faster.
"Oh, really?! You are the one with the temper here!!!!".
Luna decided to ignore her, while Celestia decided to stay quiet for the rest of the trip back home.
"sigh," Luna exclaimed.
"Something is definitely wrong with her," She whispered quietly, " And I thought I was the younger one".