(Twilight's an alicorn by the way, even if she was a unicorn during the episode)
Twilight's PoV in the Library~
"Spik~oops.. hehe..." I was going ot call Spike to take the message when I realised the message was about his disappearance. I lifted a quil with my purple aura and started writing.
Dear Princess Celestia,
Spike has ran away! After his growth incident, he thought he was a threat and ran away! I'm upset, Rarity's upset, everypony's upset! While, only the girls and I know about this, but we were wondering if you could help us. We really miss him. Please reply soon,
From your faithful student,
Twilight Sparkle
Using my magic, I sent the letter on the way.I gave a deep sigh, when a bright light flashed and a scroll appeared. Celestia's letter!
Dear Twilight,
I understand your situation. The scroll i have attached is called Dragon Track. Master it with Rarity and use it to find Spike. I hope this helps.
Princess Celestia
I looked at the scroll with "Dragon Track" and scratched my chin. It was written in Neightalian (Italian) I had to translate it or Rarity and I could not perform it. With a sigh, I started translating.