In the old legends, the stallion slays the evil dragon lord with his mighty sword to rescue the princess in distress, and then they get a happily ever after.
Conversely, that is not the scene that Celestia walked into when she reached the site of the explosion. Discord was laying on the ground subconscious, but definitely alive. The Wonderbolts were just resting there unconscious as well. Her sister Luna is between the hooves of Azrael in a rather intimate (non sexual) embrace, with him looking straight into her wobbly eyes, as she tried to shake the dizziness away. Oh and the scythe is planted some ten hooves away from everypony in a crater without a single smudge of blood on it.
“Have you awoken from your stupor, Ma Princesse?1” he whispered in her ear as she shook herself awake.
“Hi Azrael,” she replied in a nervous tone, “you are too close to comfort, can you put me down?”
“But, ma Cherie2, my fairest of maidens, how long have I longed for those dark eyes of yours to enchant me to no ends. How I missed moon gazing at your tapestry of heavens, thinking of the wetness of it all when my dreams will come to an end.”
“Alright then, thou have gotten far too intimate for my bearing,” Luna suddenly snapped as she realized that her annoyance caused her a regression toward her archaic self, “might I suggest thou GET YOUR HOOVES OFF OF ME, before I snap them in half?”
“Azrael,” interrupted Celestia, “Always good to see one of Draco’s more charming personalities.”
Azrael looked up, with possibly the most annoyed gaze anypony gave to the princess of the sun directly, “Halt die Klappe3 Sun-butt, I am still not talking to you.”
The rudeness of that comment left the sun princess flabbergasted.
“They were harmless pranks, Azazel” the sun princess justified herself, “you have done far worse to me within the past minute than all the pranks I pulled on you for a decade.”
“Ja4, I did.” He replied in a strict tone, dropping Luna in the process, “It was a sweet payback for all the times You made me look weak in front of our entire faction; not Azrael; not Draco. ME.”
“Can you put our history aside?” Realizing the futility of this argument, Celestia moved to the main event, “there is something important we need to talk to you."
He huffed in frustration, but his expression changed to amusement when Shining Armor charged to the scene with a battle, horn ablaze, hatred in his eyes. The first bolt, Azazel dodge, the second bolt, he blocked, Shining didn't have time for the third bolt when Azazel tackled him, pinning him to the ground, horn carefully secured on an unwanted target, Celestia.
“Don’t struggle,” commanded Azazel, as the chains appeared out of nowhere on Shining’s neck, “Explain yourself.”
“You hurt my sister!” Shining replied, struggling futilely against the grip of a larger opponent, “She woke up and couldn't stop crying, didn't even let me touch her. You ruined my sister!”
Azazel sighed, “Well, that’s what happens when you get interrupted in the middle of a mind link.” He gave a glare at Celestia who suddenly shrunk in size, “Can’t fix her, entschuldigung...”5 He then wrapped part of his chain on Shining’s muzzle making sure the captain won't voice any accusation in the near future, “Now, if you can excuse me, I have some important things to care about."
Azazel walked toward his scythe. “It took ten years, but now I can finally get rid of you, once and for all, nun da6 I have you under control,” he pointed at Discord, then trailed his hoof toward Luna, “I can return to ma princesse1.” He said skipping toward her.
“Oh for pity’s sake,” exclaimed Discord, “Just kill me already and be done with it, this routine is getting too dull.”
“Ah you’re awake.” Replied Azrael, “désolé7, but I need to make sure that my midnight celebration is complete before I indulge in carving you up."
“Did he call me his midnight celebration?” Luna had a suspicion, and Celestia nodding to her wasn't helping alleviate it at all.
“Why yes,” the prying pegasus quipped, “Just like your mane.”
“You sniffed my mane, didn’t you.” Luna’s disgust was apparent.
“L’arome8 Midnight mist,” he replied poetically, “Sparkly with a hint of freshness to it.”
“You are incorrigible.” She exacerbated with a huff.
“I sure am,” Azrael replied with a mischievous grin, “Ora,9 for some bloodshed.”
“Finally, someone we can talk to.” Celestia flew the small distance between Discord and Draco, making sure he finally got her undivided attention.
“And what is it you want to talk about?” Draco walked in an exceptionally calm manner, however he did not stop when reaching Celestia, which caused her to skid back protectively toward Discord.
“Listen, you don’t really need to harm Discord anymore.” She explained while spreading her wings and hooves over Discord, “we managed to reform him a while back, he’s one of the good guys now.”
“we turned him to stone for a thousand years,” Luna landed next to her sister, trying to impose a stronger front against the executioner, “then he escaped, then the new bearers of the elements of harmony turned him for a year before finally convincing him of the importance of friendship, thanks to a very sweet mare that I think you will adore.”
“And if you do anything to harm her.” Discord sneered, “I’ll make sure you pay dearly for it. YOU HEAR ME?” he yelped when Celestia kicked him in the stomach with a "you're not helping" warning.
A moment of awkward silence settled in, Draco wore a different expression than the one when Celestia asked him to listen to her, she later described it as a very creepy smile decorating his face.
“Draco?” Luna poked him tentatively.
“Did you say a thousand?” Draco's question came out unusually timid.
“Yes, a thousand years.” replied Luna, “Is there something wrong with that?”
“Is there, something wrong?” Draco gave a very nervous laugh, “Everything Is Wrong With That,” the nervous laugh turned into a full bellowing, “How in the wide wide world of Equestria could I have lived for a thousand years? I'm mortal, I shouldn't have outlived all the dragons, the griffons, the changeling king, the sentinels of the Frozen North, and each and every pony I ever knew, but the funny thing is That No One Even Bothered To Check If I Was Alive!!!”
Tears were running out of his eyes to everypony's surprise, his sobs turned into a bitter laugh, “even my vengeance have lost it’s meaning, there is no justice if all those who suffered have long perished to dust.”
“I’m terribly sorry Draco,” tried as she might, Draco refused Celestia's embrace.
"I am left with nothing," before tears would run down his cheeks, he released his prisoners, then with a single jump he vanished from existence.
As Spitfire woke up, she looked around to see everypony was still in shock, “What happened here?” She asked.
“I have no idea” replied Shining Armor.