Calcifer.

Twilight Sparkle...

The letter you just sent me is the gravest letter I've ever received.

Not because of your friend's departure, but of something of greater importance.

A tear fell onto the parchment.

"Oh, dear..."

Celestia was alone in her study, when she received the letter from her "star" pupil Twilight.

"Why her God?  Why her?" Her inner voice pleaded.

She used  a quick "dry up" spell to expel the dampness that fell to the paper before her, and continued.

I'm not permitted to explain anything, but I can tell you this; a shadow of a story wrapped in something true.

Before you and your friends were born, I was "visited" by somepony very special.

He told me something magnificent, beautiful even...

Celestia gasped for air.  She realized that she wasn't breathing while she wrote...  and why wouldn't she.  This might be the final letter to her student.

Another tear rolled down her cheek.

She bowed her head in painful emotion.

"Sister?"

Celestia was startled to hear the voice of the messenger from so long ago.  She sharply  turned to the door of her study to find Luna, her sister, poised in awe and somewhat shock at seeing her older sister in tears.

"Luna?"  Celestia asked.

"Sister, are you well?  Why are you weeping?"

She couldn't tell her why, but she was caught redhooved in an emotional state, and Luna would need an answer.

Celestia stood up from her chair, and slowly walked towards the door.

She stopped in front of her sister, her head held up high, eyes bleeding tears,  an emotion of pain clearly mirrored her frame, she bit the bottom of her lip as she looked down into Luna's beautiful night-gale eyes.

Without hesitation, Celestia kissed Luna on her forehead.  A kiss of sisterhood, of family, of sorrow.

Celestia gently withdrew her kiss.

Luna was now beyond confusion.

"Something very bad.  We'll all be fine, but at the same time, we're all in danger.  I will lose somepony very dear to me, and you..."

Luna stared at her sister in utter wonder.  What became of her sister?  Why was she like this?

"You don't know the being we will lose Luna, because he's already lost..."

"My sister, what are you speaking of?"

"Luna... something remarkable is going to happen."

Celestia smiled.  It was a joyful smile.

"What?" Luna asked.

"Hope."

***

The messenger told me things are going to be O.K., but let me tell you Twilight.

Peace is coming.