The doors parted, and there before them all stood Princess Luna. 'How had she gotten past the sentries', Queen Chrysalis wondered. No matter. They were all flunkies anyway. It was really no surprise that they hadn't been a match for her. But now the real fun began.
"What is going on here?" Princess Luna asked, eyeing the room. Queen Chrysalis stood at the top of the steps, while Princess Celestia hung upside-down inside an eerie-looking cocoon.
"Yay! Luna!" Celestia cheered, while clopping her hooves together. Luna just smirked.
"Well! If it isn't Princess Luna!" Chrysalis chimed. "How good of you to join us!"
"I thought I was to attend a wedding. What is the meaning of this? And who are you?" Luna demanded.
Chrysalis just laughed. "Who I am is not nearly as important as 'what' I am, which is the new ruler of Equestria!"
"Oh, really?" Luna asked, rolling her eyes. "And just what makes you think that?"
"Foal!" Chrysalis shouted at her while pointing at the cocoon. "Don't you see? I've already defeated Princess Celestia! What have I to fear from her 'younger' sister?"
Luna looked back at Celestia and commented, "Yes, it is an interesting look for you, sister." Celestia replied by sticking out her tongue. "Indeed, I am younger." Luna continued.
"Boo!" Celestia protested.
Aside from a slight grin, Luna ignored her. "But you misjudge me," she said, taking a more serious tone, and looking Chrysalis in the eye from across the room. "For you see, I am the princess of the night. I bring darkness to the land." As she spoke, Luna walked slowly forward, past Celestia and towards the changeling queen, her form slowly shifting into something much more fearsome. "As Nightmare Moon," she said, now in full form, her voice booming. "I attempted to bring about eternal night."
"Oh! This is going to be good!" Celestia raved. "Somepony turn me around so I can see!"
"Am I supposed to be impressed?" Chrysalis jeered. "If I recall, Princess Celestia defeated you, and now I have defeated her!"
"Yes, how unfortunate for you," Nightmare Moon chided. "For you see, your knowledge of history seems to be a bit lacking. I was indeed defeated by Celestia. However, she required the Elements of Harmony to do so. Do you know why?"
Chrysalis had no answer as Nightmare Moon began ascending the steps towards her, stretching out her wings ominously.
"Because I have always been the stronger sister!" she yelled.
Chrysalis swallowed hard, fear coming into her eyes for the first time.
"And," Nightmare Moon continued, now nose to nose with her. "While Celestia prefers not to cause suffering, and would have shown you mercy, making your defeat swift and painless..." She paused and grinned, bringing a wicked hoof up to the evil queen's throat, tracing a vein with its tip, then whispered, "I will greatly enjoy it."
"Somepony turn me around! Please!" Celestia bellowed.
One epic thrashing later...
"Well!" Luna beamed. "That was fun!"
"Waaa!" Celestia cried. "I can't believe I missed the whole thing! It's just not fair!"