At the castle in Canterlot we see everyone ready to see the newly couple. The main ruler of Equestria herself: Celestia is ready for the ceremony as she came down. Once she did everyone sat down thus began the ceremony.

"Mares and gentlecolts. We are gathered here today to witness the marriage of Cadence and Shining Armor. And now with the power invested in me it is my greatest pleasure to pronounce you....." Celestia said but got interrupted.

"STOP!!" Twilight said. Everyone was annoyed by that. Why did she have to ruin the occasion?

"Grr. Why does she have to be so possessed of her brother?!" The imposter said. That received some confused looks from everyone. Quickly she pretended to be sad.

"Why does she have to ruin my special day?!" The imposter said crying fake.

"Because it's not your special day! It's mine!" Cadence said. Everyone was shocked that 2 Cadences are in the room.

"What?! But how did you escape my bridesmaids?!" The imposter said.

"Well we had a little help to do that. Come on out sweetie." Cadence said.

You walked through the door and when you came in everyone was shocked that a human with a demon symbol on the chest was in the castle. You stopped and looked at the imposter with hate in your eyes.

"Him?! Ha! What did he do to stop my bridesmaids?!" The imposter said.

"You mean besides shocking them with red lightning? Yeah not really smart goons to send out." You said. The imposter's smile vanished when she heard that.

"Your kidding right? Please tell me your joking." The imposter said.

"Im not. And now this wedding is over!" You said.

"Clever. But your still too late." The imposter said.

"Oh yeah?" You said as you jumped high in the air and landed in front of her. Everyone was shocked by that.

You then conjured some red lightning and zapped the imposter. She screamed in agony as everyone saw that and gasped. While she was shocked she began losing her disguise and was no longer Cadence but rather a bug humanoid ailcorn and smoked up. She was Chrysalis. She then got up.

"Did that look that I was joking now bug breath?" You said.

"Ok. I seriously did not expect that. But as Queen of the Changlings is was up to me to find food for my subjects. I've been feeding off Shining Armor's love and he's growing weaker by the minute. Soon i'll be taking Canterlot then all of Equestria!!" Chrysalis said.

"Not if I take you out first bitch!! I took out your bridesmaids and now im gonna take you out too!" You said.

"Oh really? And how you gonna do that?" Chrysalis said.

"Bug brain. I would consider some conserve. You see I've always been a guy who knows how marriages work. I also have...... demons." You said as everyone gasped.

"And now Chrysalis. THIS demon will be your nightmare. Prepare for the wrath of the Demon King!!" You said.

The symbol glowed again and began the transformation. Your eyes became a hellish red, your skin turned a sickly white, your muscles flexed a little, your teeth sharpen, demonic writing appeared on your shoulders, a tail and demon wings grew from your back, horns grew on your head and finally claws grew on your hands and feet. The transformation was complete and you rose above Chrysalis who was scared out of her pants. Everyone gasped in terror when they saw you turned into a demon. Even Twilight's friends were scared.

"Oh for Celestia's sake!!" Rarity said.

"Holy mother of Wonderbolt! He's turned into a demon!! This should be good!" Rainbow said.

"A demon?! Oh I can't look!" Fluttershy said as she hid behind Rarity.

You walked towards Chrysalis who was still scared. In rage you released a demonic roar in the room causing everyone to scream and run out the door. The only ones who didn't leave were the Mane 5 and Spike. You then started to speak in a demonic voice.

"HAHAHAHAHA!! So Chrysalis? Still have the chuckles now? Or you gonna face me The Demon King?" He said.

"Okay that's new. But even so my army will be victorious!" Chrysalis said.

"Really now? Okay. Then let's see the Changling Queen try and stop the Demon King!!" He said.

Chrysalis blasted some magic at you but you were unfazed. She tried again but you still remained unfazed. Then you summoned a demon head and it blasted some dark magic right at Chrysalis shocking her real badly. You flew at her but she tried to escape. You chased her down and she couldn't lose you. You grabbed her and slammed her into the ground. She got up and blasted you but dodged. You then breathed red fire at Chrysalis causing her to fall back in shock. Even the others were shocked.

"He can breathe fire?! This demon is tougher than I thought!" Spike said.

Chrysalis blasted her magic again. But the Demon King was starting to get annoyed with that. He conjured some red lightning and zapped Chrysalis. She screamed in agony as the lightning hit her. He stopped and Chrysalis fell to the ground all shocked.

"HAHAHAHAHA!! Is that all you got bug brain!? Im gonna show you what I can do!!" The Demon King said as he flashed his eyes causing the room to turn into a nightmare realm.

Chrysalis who recovered saw everything was a living nightmare. She had never been more scared than right now. Suddenly she heard giant footsteps coming to her. She looked behind and saw a giant version of the Demon King is running to her.

"HERE I COME!!" The Demon King said.

She screamed and ran as fast as she can to get away from him. But no matter how fast she ran The Demon King was still on her trail. He breathed red fireballs and summoned some red lightning at Chrysalis. She tried to dodge but it was too much for her. She got burned and shocked a few times but still kept running. 3 hours passed and she couldn't keep up any longer. Then she slammed her face into a wall which bruised her face and brought her back to the real world. She fell down all exhausted.

"You monster!! You think you can scare me? I won't be defeated by the likes of you!! Guess I better get my Changlings in here a little earlier!" Chrysalis said.

"Monster? That's a good one! Im unstoppable!! And if you think a pathetic army of bugs will save you then wait till you see MY army!! The Demon King said.

The Demon King then summoned a portal which brought out millions of demons. At the same time the Changlings came in but when they saw all the demons they were scared out of their wits.

"What the fuck is that?!" A Changling said.

"I don't know but their monsters! Let's get out of here!!" Another Changling said. They were about to leave until 2 demons closed the doors and trapped them.

"You ain't going anywhere today bugs! So demons! One and all! Get those bugs and exterminate them dead!!" The Demon King said.

The demons obeyed his command and attacked the Changling army. They were killing them real good. Some were eating their souls out. Others were slashing them til they bleed to death. Even one demon ate a Changling's head right off! When they finished the demons disappeared back into underworld. Chrysalis saw her now dead army and looked at the Demon King in fear.

"You really are a demon!! You couldn't possibly defeated my army so easily!! HOW IS THE CHANGLING QUEEN LOSING BY THE LIKES OF YOU?!" Chrysalis said crying.

"HAHAHAHAHA!! I told you I was unstoppable!! And now you paid for it! But im not done with you yet!! Time for some real fun!!" The Demon King said.

He took the opportunity to fly towards Celestia and possess her body. Once inside she had her eyes shut. Everyone was worried.

"Umm. Princess? Are you okay?" Applejack said.

She opened her eyes and they glowed the same red color. Then she flew towards Chrysalis and prepared to fight.

"Now let's see how you like facing a demon possessed ailcorn!!" The possessed Celestia said. She blasted a combined magic beam of yellow and red at Chrysalis. She screamed in agony as the magic shocked her. She got out and blasted a magic beam at her causing the Demon King to leave her body. The Demon King was not fazed by that. Celestia however was unconscious.

"Oh you just made a big mistake bug lady. Now you'll really know TRUE fear from me!!" The Demon King said.

He went to Chrysalis and grabbed her by the throat as she struggled to get out but was no good.

"Look into my eyes." The Demon King said as Chrysalis was really in fear.

"No! You cannot do this!!" Chrysalis said.

"Oh yes I can! Now gaze into my eyes. Your soul is stained by all the sins you committed. Now feel their pain and DIE IN THE HELL RAIN!!" The Demon King said as he performed the Death Stare.

His eyes glowed and into Chrysalis's soul. She screamed in fear as she saw all those people she hurt in her visions. Then she felt a burning sensation coming from her guts and her body started to light on fire. It continued til her body was completely burned to ashes. Then her skull you carried. You threw it on the ground and crushed it with your foot. Thus ended the battle and the Demon King merged victorious! The spell Shining was under is broken. He was finally himself again.

"Wha? What happened? Is the wedding over?" Shining said.

"Im afraid it is. For the moment of course." The Demon King said.

The symbol glowed again and you returned back to normal. The reverse transformation was a bit painful but you couldn't deny that it still hurts to you.

"Ow! Fuck that hurts! Man im not gonna get used to that!" You said.

"Who cares?! How the hay did you do all that awesome stuff as a demon?!" Rainbow said.

"Girls, girls. Let him explain the situation and he'll tell you. Go ahead sweetie." Cadence said.

"Umm actually how about I tell you somewhere that's less destroyed. Cause this is a real wreck." You said pointing to all the damage caused during the fight.

"Yes. You really didn't have to wreck a beautiful wedding hall like that." Rarity said.

"And the cake's ruined!!" Pinkie said. The others gave her confused looks.

"Okay first of all no one cares about the cake. Second of all it wasn't my fault that the Demon King powers I possess can't be controlled all the time." You said.

"Demon King? That's what you became fighting Chrysalis hon?" Applejack said.

"Yes. Plus I had to kill that bug. She had that guy under a spell and I wasn't going to let that slide." You said pointing at Shining.

"Well he has a point. But all you did was pretty hardcore." Shining said.

"So could you tell us how you got those cool demon powers?! Please?!" Rainbow said.

"Okay, okay!! Don't get all up in my face! Come with me and i'll explain everything." You said.

"But what about Celestia? Will she be okay?" Twilight said.

"Put her in bed. She'll wake up. But may have a few memories lost as a side effect after I possessed her body." You said.

"Well I least she'll be okay." Twilight said as she carried Celestia to her room. After she did she returned to the group and decided to take you to her place.

"Come with me to my library. You can tell us there." Twilight said.

"Okay. Better than nothing I suppose." You said.

Everyone left the castle as they saw all the damage caused by you during your fight against Chrysalis. But if you were gonna stay here than the ponies needed answers from you.

Author's Note

The red is for the demon king speaking. Just so you know. Tune in to when we hear everything ponies want to hear