Solar Dream

It had been 100 years since Nightmare Moon was defeated, and Luna was starting to feel some pains in her head, she shrugged it off for a while, but they started to hurt, it seemed like her body had an urge for something, an urge for night.

~The Next Day

"Dearest Luna" Celestia said "You haven't been yourself lately, are you okay?"

"I'm fine" Luna says, holding her head.

"You don't seem well, go lay down, I'll come bring your favorite toast, the one shaped like moons." Celestia told her sister.

"Okay, I should be fine, my head just hurts." Luna said, but she knew it was more than that.

~A While Later

Celestia was thinking to herself A headache, that's how the transformation into Nightmare Moon began, but that couldn't be happening again, Could it?

"Princess?" Celestia's thought was cut short by Shining Armor coming to her.

"What, Shining Armor?" Celestia asked.

"It's about Luna, we think Nightmare Moon is back." The colt said.

~In Luna's room

"GET OFF OF ME YOU FIENDS! I NEED... NIGHT!" 'Luna' exclaimed, as she was held down by the Royal Guards.

"We can't Princess, you're too far gone" One of the guards said.

'Luna' breaks through the royal guards and heads straight to the Everfree Forest.

"She's stronger than ever, the Elements of Harmony will not be able to stop her. There is only one option. I have to become Solar Dream." Celestia said, but then she realized a problem. Solar Dream would bring endless sunlight. Eventually bringing so much heat that ponies would have heat strokes, and Solar Dream would kill Luna as well as Nightmare Moon.

The moon came up and sun went down. It was only 3 PM so everyone knew that something was going on.