Celestia watched the bright portal in the sky, she stood ready, not sure what was going on. The royal guard stood by her side, spears and swords shining as brightly as their armor. Suddenly, a large ship burst through the portal. It was triangular, with a large tower near the rear of it. It seemed to absorb all the light around it, its black paint contrasting the white light of the portal.
"I know this ship." Celestia whispered to herself. "He's back." She turned to the guard. "Everyone get to the castle, sound the alarm and don't let anypony in or out. I'll be back in a while."
The guards did as they were told, Celestia watched them turn and leave, then she took to the air and approached the ship. She felt a tugging drawing her in, making her unable to move on her own will.
She was dragged into the hanger area of the ship. When she touched down an armada of white armored soldiers pointed their blasters at her. She frowned, then stood up, causing them to flinch.
"At ease." A soldier in a grey uniform said. "She won't try anything." He turned to the door. "Lord Vader, the prisoner is here."
"Very good. You are dismissed."
The stormtroopers broke rank and walked away. Soon only Celestia and Darth Vader were left in the hanger.
"I know you are not alone." Vader said through his helmet. "I sense... your sister?"
"LUNA! NOW!" Celestia yelled, drawing her lightsaber from under her cloak. Suddenly a shadow in the corner of the room came to life, shooting toward Vader. The shadow formed into Princes Luna, who had a lightsaber of her own.
Soon, the two princesses each had their sabers at Vader's throat. He laughed evilly, then drew his own blade and rolled backward.
"I will get you, Celestia. Equestria will soon follow the emperor!" He yelled, pushing a button on the wall. The forcefield at the hanger door dropped, and Celestia and Luna were ejected due to the pressure differences. The two fell to the ground below.
"I sense much anguish." The emperor said behind Vader. "Celestia has regrets, and Luna has much anger. They will join us. Don't you worry."