Luna woke up startled. The nightmare vanished in a matter of seconds but the feeling of guilt and fear never leave. She left the bed and moved to the mirror. Her mane was still flat and dull but a few sparklers were visible, at least she had grown back to her original height. Her powers were slowly returning with each passing night.

"Luna, may I come in?" Luna didn't actually said yes but Celestia still went inside. "Good morning sleepy head!" her tone was always cheerful, like a spring morning.

"Is it morning? Or is it night? We can no longer tell..."

Celestia magically moved the curtains. "Its actually the afternoon but I figured this is what you will consider morning. Just like old times, sleeping all day and working all night!" Celestia joked but Luna kept her straight face. "Want me to call for breakfast or dinner in your case?"

"We have no desire for food, sister."

Celestia sighed. "Please, do you have to use the royal we when is just the two of us?"

"We...I apologize sister. Old customs die hard."

"So it seems. So, what do you want to do today? Want to take a walk across the castle? Or maybe visit the town, there´s a bakery I will love to show you!"

"Neigh sister. I don't want to leave my chambers...not yet." Luna turned over, making an effort to not take a look at Celestia´s face. "I will return to bed."

"As you wish." Celestia was about to leave the room when she stopped and levitated a black book with swirling stars on its cover to Luna.

"What is this?" Luna asked.

"A book, silly filly."

"We can tell that."

Celestia giggled. "Its a journal. You know, for writing...stuff."

Luna looked at her sister, puzzled. "Stuff?"

"Just write whatever you want on it. Whatever comes to your mind. I'm sure you had plenty of time to think." Celestia regretted those words the second they came out but Luna just kept looking at her present. Celestia slowly moved to the door. "Good night, Luna." and she closed the door.

"...good night, Tia."

****

Princess Luna opened the door of the chambers with her magic. The room was simple but practical, a bed, a desk, a mirror, a good room for a student. Obviously Trixie´s reaction was to sneer.

"Trixie Lulamoon, these will be your facilities from now on."

"These?" the unicorn complained.

"According to the rules of the magic duel which you agreed upon.." the Princess emphasized those words. "You are from this day forth my student and thus will be relocated to my castle."

Trixie levitated a worn out pillow. "Not exactly the glorious palace of the night that the Great and Powerful Trixie was expecting."

Luna sighed. "Must you refer to yourself as Great and Powerful even when is just the tow of us?"

Trixie raised an eyebrow and looked at the princess like if she had just asked if Celestia raises the sun.

"Your training will begin in the morning."

"I see no point in having me as your student. Do you want to compete with your sister or something?" Trixie covered her mouth and trembled. Her big mouth had already put her in enough troubles. She was surprised that Princess Celestia had no banished her to the moon or something for humiliating her student and "enslaving" (she preferred the term "improving") Ponyville.

"As flawed as she can be, Twilight Sparkle has no real knowledge of guilt over doing something wrong. It simply isn't in her nature to do harm to others." Trixie looked at the Princess who was looking through the windows at the night sky. "You know well the feelings of guilt and regret and thus you could never be a student of my sister..." and Luna looked straight at Trixie. "But fill the requirements to be mine."

Luna turned back leaving Trixie with her thoughts, she was feeling a strange mix of pride and fear. Being praised by a Princess felt good but the implications behind said praise made Trixie shiver. Her thoughts were interrupted by a black book with swirling stars on its cover floating in front of her.

"What is this?"

"My journal or so it was supposed to be. The truth is that for months I have nothing to write on it until now..." Luna smiled at her student. "On this journal I will record every single report of my student, Trixie Lulamoon."

Trixie smiled back and stand proud to say:

"Dear Princess Luna..."