Blazing Spark - The end of days

The day that changed the world of Equestria, was a pretty normal day, to start with. I had woken up late, business had been slow lately, and apart from a few low paying privet jobs I hadn’t had much proper work. I climbed out of bed and cantered over to the mirror. As usual my mane was a mess, I concentrated and used my unicorn magic to pass a brush a few times through my hair. I got on with a few more morning duties, it wasn’t until I was standing at my desk that I noticed the letter, sitting below my chamber door.
Weak and wearily I walked over to it and lifted it up to my face, the insignia on the back was from the royal guard. Immediately my mood lightened, this was good, this meant work, which meant bits, which meant I could buy food, oh how I missed a real food. I flipped the note over, it read;
Blazing Spark, your presence is required at the gates of Tartarus as soon as possible

Singed Shining Armour
I flipped over the note again, and again, no that was all of it. “Care to be a little more vague” I said to myself. Sighing I started getting my things ready for a long day. The letter was short, that was not a good sign, that meant the guard didn’t want to have the information written down, which meant something serious had happened. What’s more the letter was written by Shining Armour himself, Whatever had happened must have been bad for the captain himself to call in outside help. With my saddle bag packed I cantered out and went out to work.
The gates of Tartarus were an ominous place. Tall walls loomed in a circle in front of an equally tall, majestic door. No life flourished in this area, the ground was nothing but hard dusty dirt, dust clouds hovered around my hooves as I slowly walked into the gloomy arena. I took in information as I walked, to my left a string of ponies tended to a massive three headed dog that was evidently badly injured not so long ago. To my right Stallions dressed in royal guard garb stood around a table, a large sheet of paper which I could only assume was a map was spread over the table top.
I walked towards the centre of the arena. That captain of the royal guard, Shining Armour was stood kitted out in his best official uniform, next to him was a purple coated unicorn, her mane was straight and was cut across her fringe, two shades to purple and pink streaked in a line down her mane and tail.
Shining Armour spotted me as I moved closer; he nodded to me and beaconed me over. “Ah blazing spark, thank you for coming on such short notice” he said, even though an obvious catastrophe had happened not so long ago Shining Armour still portrayed his calm and knowledgeable personality. “Don’t mention it” I said “I had a free slot in my schedule”. Shining Armour smiled and looked at the pony next to him, “Twilight, this is blazing spark, Blazing Spark this is my sister Twilight Sparkle”. Twilight gave me a studying look, after a second she smiled at me and said “Shining Armour has said a lot about you”
“really?” I said glancing at the royal guard captain “I usually don’t deal with him directly but in the times I have he has told me noting about you, I didn’t even know he had a sister.”
Twilight shot Shining Armour a quick glare before saying “at much as I would like to stand and chat we have a major issue on our hands”. My ears perked up as she said that “what type of major issue?” I asked, the pony glanced around before saying quietly “the apocalyptic kind,” “let me explain,” Shining Armour said “last night we heard word that the gates of Tartarus were bring attacked. The royal guard were rallied and with the army amassed Princess Celestia and I lead the charge to the gates, only when we got here there was no fight”.
I looked around at my surroundings again; there was no sign of a struggle, at least not on the scale that was described. I looked at the massive three headed dog again, “Where is Princess Celestia now?” I asked not looking away from hound. “She went through the gates too check all the prisoners in there” Twilight said giving a nervous glance towards the large looming gates. “hmm” I said “and what happened to the pooch?”
“He was unconscious when we arrived, Fluttershy and her team are working on finding out what happened to him”.
“Must have been something big to take down a mutt that size”
“Cerberus” Twilight interjected
“Gesundheit” I said.
Twilight glared at me. Before she had a chance to say anything else she was cut off by a thunderous low gowning noise. I swung my head around to see the huge gates slowly open. All the guards’ present bearded arms, the unicorn’s horns glowed as they prepared attacks and the pegasi’s stretched out their wings ready to charge. No monster stepped out from the gates; in fact it was quite the opposite. A beaten and tired looking Princess Celestia staged from the gates. As soon as the doors were closed the Princess sat wearily on her haunches. Immediately several ponies rushed towards her, Twilight and Shining Armour included.
I didn’t run, I walked observing everpony else. Those who were not surrounding the collapsed Princess were ether bowing or starring in shocked science, apart from one, a stallion with a black coat and an even blacker mane. I watched him as I walked out of the corner of my eye. The black stallion was watching Celestia like many of the other ponies surrounding him, though instead of the expression of shock and horror he was smirking, grinning even. “Princess Celestia, what happened?” I heard Twilight ask, I glanced over at the crowd of ponies, when I glanced back at the black stallion he had disappeared.
Celestia stood up straight, it struck me how much of a presence she exerted, by just being close to her a wave of awe washed over me. “Everypony listen” she said in a loud voice, “I have searched through all of the imprisoned within Tartarus and have found that none of the evil creatures trapped within have escaped, please go back to lives in peace”. With that all the ponies began to depart, the only ponies who stayed were a few royal guards and the team working on the three headed dog.
Once all the other ponies were out of earshot the Princess bowed down her head and was about to say something when she looked directly at me, I bowed my head respectfully. “I don’t believe we have been acquainted” she said, “this is Blazing Spark” Shining Armour said “he is a magical and supernatural consultant, he occasionally helps the royal guard in our... stranger cases”
“I see” Celestia said “It is a pleasure to meat you Blazing Spark”
“likewise” I said my head still bowed. “If you wouldn’t mind, please follow me, there is something I must discuss with you in the privet”