Canterlot Main Plaza

A unicorn Guard flew into a shop as more took his place. Meanwhile, the two Princesses trotted into view.

"What is happening?" Celestia asked the Captain. He was a large, brawny stallion with scars decorating his body.

"This, this thing came from the sky, smashed down outside the city and started blowing everything up. Magic has no effect on it." The Captain said. The trio watched as one of the guards came out of the smoke, smacking into the ground hard enough to break a few bones. A large shape came out of the smoke: Massive, grayish black, and sporting large horns. Celestia's eyes widened in shock. It was huge. It also had massive tubes on it's arms that, when the giant pointed the tubes at something, they would jerk back and the object would suddenly explode in flames. Celestia turned to Luna, a hard look in her eyes.

"Luna, distract the Horned One while I conjure the spell!" Celestia said before teleporting back into the castle. Luna looked on the battle with uncertainty, the Horned One seemed unstoppable. With a loud battle cry, Luna flew into the fray, unleashing a large blast of energy into the Horned One's face. The giant stumbled back, clutching its face in one hand, while the other was still being pointed at the Guards. Luna hovered, watching as the Horned One knelt on the ground, still holding its face. Did We harm it? She thought. Risking attack she descended until she was eye level with the giant.

"Why hast thou attacked our city?" Luna demanded. The giant's movements slowed, before its hand lashed out, grabbing Luna by her neck. The giant stood, lifting her up, a low growl escaped from it. Luna couldn't help but feel a sense of despair at the Horned One. She tilted her head upwards to face the Horned One, only to find its eyes. Instantly, the world around them melted away as she was standing in a nighttime town with the full moon behind them. Luna suddenly fell down with despair and sadness in her heart. With tears in her eyes, she saw the Horned One make its way towards her. Expecting an attack, she crouched into a defensive position, only to watch in confusion as the Horned One crouched down and laid its hand down in front of her, fingers open.

Canterlot Castle

Celestia dashed through the halls of her castle, the scroll Primus gave her held y her magic. She burst out through the front doors, before opening the scroll. It wasn't a long spell, just an incantation, but with an interesting choice of words. Celestia took a deep breath before chanting:

"Children of Primus, heed thy call, transform and rise up."

The scroll lit up, brighter and brighter, until Celestia couldn't see anything. She could hear the battle, the explosions, then the sound of air being pushed out. Celestia collapsed on the ground, her breathing ragged. The last thing she could see before blacking out was a large form crouching over her.