Elemental

Twilight Sparkle woke up terrified.
She had been having horrible nightmares all night long.

They targeted all her worst fears, from losing Spike to going back to magic kindergarten from the one that was too horrible to think about. They were so vivid, so realistic...almost as if they had been specially created for her. But that was nonsense. She just needed to get busy and move on with her day.

Still groggy, she shook the sleep from her eyes and ran a hoof through her mane.
What do I need to do today...Oh yes, I need to help Luna with patrol...and monitor the pegusai...and a bunch of other boring tasks.

"Luna above!" cried Twilight. "I completely forgot about the picnic in Des Mares!"
She would have to rearrange her entire schedule to make room for this new event.

"Spike, I need you!" Twilight yelled.

"Here I am, Twilight! What can I do for you?" asked the baby dragon as he skidded into the room.

"Spike, I forgot about the picnic in Des Mares. I need you to make sure I have enough time to get to all of my events," explained Twilight.
Spike gave her a strange look.

"Uh...Twilight?"

"Yes, Spike?" Twilight asked impatiently.

"You don't have any appointments for today, remember? You haven't been a princess for months now," the baby dragon told her anxiously.
Twilight stared. Her pupils shrunk to a quarter of their normal side. She started quaking violently.
And then, she snapped back into normal Twilight, quick as a wink.

"Oh, yes, Spike. Thank you for reminding me," she stated calmly.

Spike started to grow anxious. He had seen this side of Twilight before. Twilight, who cast a Want-It-Need-It spell on everypony in town just to write a friendship report. Twilight, who lay on a park bench talking to herself and stroking her mane. Twilight, who when she got really upset, practiced her most violent spells on her ready-made dragon punching bag...

Twilight was just as anxious, only she hid it better. She remembered now, remembered the event that had been plaguing her dreams and stalking her mind. She remembered when she had been disgraced from the Equestrian throne. And all because she had wanted to delve deeper into magic nopony had ever studied. Dark magic. There had been some, like the creator of the Alicorn Amulet, who had dipped their hoof in. But nopony had ever poured her heart and soul into it like Twilight did with her old studies. Nopony...until Twilight.