Reborn as a dragon

{Celestia POV}

I had just led everypony out of the room so he could rest when Applejack asked. "How long does he have?"

I looked at her and sighed as I said. "A month at the most and." I said until I felt a familiar presence but it felt very strange.

"Is something wrong Princess?" Bright Mac asked me.

"Yes, you stay here I need to check something out." I told them as I teleported outside the hospital and started lowering the sun.

I felt the presence heading towards the center of town so I did the same as I took the quickest route.

I arrived at the center of town a few minutes later, but it seemed that what I had felt beat me here as a pony as large as me stood there facing me with a smile on her face.

"I didn't expect you to find me so quickly, well I guess I could call this a happy accident." She said aloud.

"Reveal yourself!" I shouted as a faint glow appeared under the hood as her cloak flew off her revealing Nightmare Moon. I took a few steps back in shock at what I was seeing.

"Surprised to see me alive, well I have to say I was too." She said while chuckling at my reaction.

"How did you survive!?" I yelled as her chuckling turned into an evil laugh.

"How do you think, right before the elements almost destroyed me I took that young dragon's core in hopes of taking him with me, but I never thought it would allow me to survive just long enough for the elements to stop, I was even more surprised when I gained my own body, I'll tell you his core is amazing, it's potential is limitless." She explained, and several gasps could be heard as I turned my head to see the elements, and the rest of Spyro's family here.

"What are you doing here I told you to stay at the hospital." I told them then Pinkie started jumping up and down, as she said.

"Well me and the girls were at Sugar Cube Corner until we saw Applejack and her family racing towards the center of town so I grabbed them and followed her." She said in one breath.

"How perfect, not only can I get rid of Celestia, I can get rid of the bearers of the elements of harmony." Nightmare said joyously as her horn glowed, but not with her usual blue magic but a dark aura.

I teleported in front of them and cast a shield, as she unleashed a barrage of magic bolts that cracked the shield with each attack.

"What, she wasn't this strong before." I said panicking she shouldn't be this strong especially after the elements hit her.

"Thank the dragon's core for that, with it my power has reached new heights that I never thought were possible." Nightmare said as she stopped her barrage.

"You demon, give back Spyro's core!" Applejack yelled as she charged, but her mother and father grabbed her.

"Oh so his name is Spyro, I didn't really pay attention back then, well I'll be sure to give him my thanks, when I stomp his head in or maybe I could make him my play thing." She told Applejack making her nostrils flare, as she glared.

"You whorse!" Applejack screamed at Nightmare, almost breaking out of her parents' hold, but they held her tightly, as they pulled her back.

Nightmare Moon's smile fell at her words and she glared at her then soon a sinister smile appeared. "I think before I decide your fate, I'll kill you right in front of him, and with him so helpless he will hate himself for not being able to save you, maybe so much that'll kill him before I decide, that might be amusing to watch." Nightmare said as her wings unfolded as she flew up."But before that I have to take care of my sisters."

"You are no sister of mine or Luna's!" I yelled as I lowered the shield and flew up to fight her.

{Applejack}

"What do we do?" Twilight said in a paniced voice as we watched the princess and Nightmare fight above the town.

"I don't know if there's anything we can do." I told her then her panic faded as she suddenly had a look of realization.

"We have to get Spyro." She said.

"But darling, he's is the hospital, what can he do to help?" Rarity asked her as she turned her head.

"I read about something if somepony's core was to somehow be separated from them, it would constantly be drawn to them, if we can get him here his and Nightmare's would be in conflict as Spyro's tries to return to him." Twilight told us as she started running for the hospital.

All we could hear on our way was screaming and the sounds of ponies running into the tunnels Spyro's puppets dug.

We finally made it to the hospital, and ran to Spyro's room.

When he saw us he managed to push himself up, but his legs wobbled as he tried to stand up.

"I'm glad you came by so soon." He told us then coughed up blood as he fell on the bed.

Twilight didn't waste time as she said. "We need your help, Nightmare was the one that stole your core and she has returned to get her revenge." She told him and a look of determination appeared on his face as he pushed himself up again.

"What can I do?" He asked and fell off the bed, but Rainbow caught him, almost pulling out the needle in his leg.

"We just need you nearby you'll see why." Twilight told him as she pulled the needle out with her magic, and he slowly went limp on rainbows back.

"So how did you find out about this anyway?" Rainbow asked Twilight.

"After I heard about his core I headed to the library and read as much as I could in hopes of maybe creating an artificial one." Twilight explained sadly.

"It's ok Twilight, it's because of you we have a plan right now." I told her as Rainbow started carrying Spyro out of the room.

"Ok, how close do we have to be for this to work?" Rainbow asked as we followed her through the hospital.

"I don't know, but we have to get as close as we can." Twilight told her as we exited the hospital, and suddenly something crashed in front of us.

It was Celestia she was bleeding badly and heavily injured, shortly after Nightmare landed in front of her with no injuries on her body.

"So boring, I didn't even break a sweat." She said as she lifted her hoof and looked at it like she had nothing better to do.

She turned her head towards us and smiled. "Oh it seems you brought Spyro to m…." She said then looked like she was going to fall to the ground in pain, then she threw up a black substance that turned into a mist.

She watched as the mist went into Spyro, then she flew on top of a tall building. She breathed heavily as she pieced together what just happened.

She glared at us before her horn glowed with a dark aura and she sent a bolt of magic at us, but they simply turned into mist and was absorbed by Spyro.

"This is impossible." Nightmare said and before she could spread her wings something hit her from behind making her fall to the ground.

"Sister are you alright." Princess Luna said as she landed where Nightmare stood before she fell to the ground.

"Yes, I'm alright just a little bruised." Celestia said as she finally stood up.

"We have to get Nightmare to Spyro, it's his only chance!" Twilight shouted, and Celestia nodded as she teleported next to her sister.

"Shall we sister?" Celestia asked with a smile.

"Yes, we shall." Luna told her sister as Nightmare stood up to glare at Luna.

"If it isn't my weaker half, how nice to see you." Nightmare said as she spit out some blood before she charged up a spell.

Both of the royal sisters charged up their own spells and all three attacked at the same time, and as their attacks connected the burst of energy nearly destroyed the building the sisters stood on.

"Now's our chance, she can't run away now." Rainbow said with a smirk as she started walking towards Nightmare with Spyro on her back.

Nightmare started overpowering the sisters but once Spyro got closer to Nightmare she fell on her front knees as she felt her magic slipping away faster and faster.

"I've come so far, I can't let this end here." Nightmare said as she tried to stand up but she was flaked by the two sisters who started to push back her attack.

Soon dark mist started to radiate off Nightmare's body, and two faint glows could be seen as her body began to become see through.

"What's happening to her?" I asked Twilight as I watched it unfold before me.

"Nightmare's body is made from Spyro's magic, with him so close she can no longer sustain her form those two glows must be hers and Spyro's cores." Twilight explained.

Soon the two auras moved closer together and Nightmare started screaming as hers, and the royal sisters attack stopped, as her body started to violently shake as the two auras became one forming a bright light as Nightmare shattered before us.

All that remained was a shining spark that hovered in the air. "Impossible." Twilight said as she looked at the spark.

"What?" I asked her as the spark moved towards Spyro.

"The cores have merged, but that's impossible many ponies have tired to merge magic cores of powerful ponies that have passed away together, but never succeeded we just witnessed the impossible." Twilight said as she stood wide eyed as we watched the spark enter Spyro's mouth, and the gray of his underscales and horn returned to their original darker gray.

"Spyro." I called out to him, as Rainbow set him on the ground.

"Spyro!" I said again a little louder, and his legs started twitching as they moved under him.

He slowly pushed himself up off the ground as he wings spread, and pops could be heard as they stretched.

I walked up beside him and saw his eyes were still closed, as he took a deep breath. "Spyro are you ok?" I asked him as I nuzzled his head with my muzzle.

"Yeah yeah I just feel a little different." He said as he shook his head before he opened his eyes, but he quickly closed them and used his left foreleg to block the sunlight.

The royal sisters came down to see Spyro, but when they got near they had looks of worry as he posted his legs to open his eyes again.

Luna and Celestia gasped when they looked at his eyes. "What, is something wrong with my eyes?" Spyro asked, so I used a hoof to turn his legs towards me.

When i looked into his eyes, I felt fear coursing through my body as I saw what had happened, his eyes were now just like Nightmare's.