This story begins a month after the Sunset Shimmer acident where we find Princess Twilight sorting her books.
"Twi-light! I got - a message from - Princess Cadence." said Spike panting.
"Well let's see...To Princess Twilight: Flash Sentry wants to see you in the Crystal Empire." from Princess Mi Amore Cadenza A.K.A Princess Cadence. Oh no." said Twilight.
"What's wrong? asked Spike.
"This is from Flash Sentry." said Twilight.
"Is he the guy who played the gutiar and had a crush on you?" asked Spike.
"Yep." said Twilight.
"Hey I'll teach you everything I know about crushes. You know I have a crush on Rartiy." said Spike.
While Twilight was on her way to the Crystal Empire, the Changlings were aware of her crown's extordinary power.
"We MUST have that crown." said Queen Chrysilis.
"We will have the ultimate power to rule Equestria!" said Queen Chrysilis.
However the Covenant had the same eyes...
"Once we have that power, we will be able to spread our worships." The Prophet of Regret said.
The Covenant held their weapons up in agreement. So the Covenant headed for Equestria, on the way, they crashed in a dark cave. Where they find the Changlings,
"What is this?" asked the Prophet.
"How did you find the Changling's lair?" asked Queen Chrysilis.
"What lair is in a cave?" asked the Prophet.
"Ours, what blasted beast has an army of freaks?" asked Queen Chrysilis.
"Well, maybe we can help each other out. Do you know what this energy read is?" asked the Prophet holding his scanner.
"You must want Twilight Sparkle's crown. It gives great powers you know." said Queen Chrysilis. There was a silence for 2 minutes.
"Well here's a deal, you show us this "Twilight Sparkle" and you have some control of our universe. How's that?" asked the Covenant ruler.
"... Deal." said Queen Chrysilis.
So while they were planing their attack...
"SIRRRRR!" said a voice.
"What I'm not deaf." said the General.
"We found the Covenant with a black horse species that can shape shift. I read they're getting some power source." said a Marine.
"You got all of that from the symbols?" asked the General.
"Yes sir." said the spartan.
"Chief, report!" said the General.
"Yes sir?" asked Master Chief.
"We saw a STRONG energy signuture in an uncharted planet called 'Equestria'. We need you to keep it from the Covenant and secure it." said the General.
So Chief headed towrds Equestria, but he was entering their galaxy when...
"We must act... NOW!" said the Covenant ruler.
Twilight was flying towards the Crystal Empire trying not to trip on her hooves.
"Hey Flash." said Twilight.
"Yeah?" asked Flash Sentry.
"Do you see a big purple ship?" asked Twilight looking up and seeing a Conevent shuttle.
"Yeah..." said Flash Sentry.
Then they heard: KA DOOOOM!
"RUN!" said a pony running for their life.
A Covenant elite was getting to the castle, that is, untill THEY came. Suddenly a ship with the letters: UNSC, on it. Then a Spartan flew out and shot the elite with his Spartan Laser. All that was left were ashes and purple blood.
"Whoa!" said Flash who is now fleeing to tell Celestia with Twilight.