Yu-Gi-Hime! P.

Luna was at 1500 and Celestial was at 2000. A duel of the century was underway as the 2 Princesses of Equestria battled for control.

Now it was Luna's turn. She summoned Battle Minotaurus, with an attack of 1700. Celestia said "Battle Minotaurus?! That's a rare card!" Luna said "Go Battle Minotaurus! Off with the Blackland Fire Pegasus' head!" Celestia went down to 1800 life points. She then set a card and end her turn.

For 6 turns, Celestia set monster after monster to protect her, only to be destroyed by Luna's monster. Then she said "Luna, you cannot win. It is impossible! Good always triumphs!" Luna said "Just keep telling yourself that..." Celestia said "I believe in these cards!"

She drew her next card and said "I drew this heavy hitting card, The Darkhorse Gaia, with an attack of 2300!" Luna said "What the?!" Celestia said "Go Darkhorse! Kill the Battle Minotaurus! SPIRAL SABER!" Luna went down to 900 life points.

Luna then said "Trap Card Activate! Draw Phase Destruction!" Celestia said "A Trap Card!" Luna said "Draw Phase Destruction makes you draw 2 cards during your draw phase, 1 you add, and 1 you discard!" She then summoned Curse of Pegasus, with 2000 attack, and ended her turn.

Celestia drew 2 cards. She kept 1 and quickly discarded 1 without any thought. She then looked at her hand and noticed a Magic Card in it. It was Monster Reborn! She said "Magic Card Activate! Monster Reborn! I will now choose a monster in my graveyard and Special Summon a monster!" She searched through it and found the key to victory.

She said "I special summon my trump card!" Luna said "What?! It can't be! You don't mean?!" Celestia said "I summon the Blue-Eyes White Alicorn! With an attack of 3000, it's the strongest monster in the game!" Luna said "No! Impossible! How did you get that card?!"

Celestia said "Burst Stream of Destruction!" The Curse of Pegasus was destroyed and Luna went down to 0 life points. She trembled in fear.

Celestia said "Bastard... Don't think you're off the hook because you lost... You desired power so badly that you were willing to put all of the world in grave danger. For that, I will never forgive you." Luna said "Oh no! Not the-!"

Celestia then stood up, pointed at her, and shouted "Penalty Game!" Luna screamed as she was turned into a card. She then looked around in her new world. She said "Is this the world of Duel Monsters?" Then she turned around and screamed in agony as monster devoured her.

Celestia said "Luna, you probably will experience death in that world. But it's only an illusion. However, after that's over, you will be sent to the Moon to be imprisoned forever. As for me, I must guard this necklace. I will tell the other me to smash it and keep it in a box for a new host later. Only when a worthy host for me is found will it be put back together."

Celestia turned into her normal self again. On the necklace was a note saying "Smash this and put it in a box. When you find the chosen one, give the box to them." She did exactly that and smashed it with a hammer. She then kept in a locked box in her palace.

Nightmare Moon woke up from the bad dream. She said to herself "I had it again. But soon, they will be gone, and I will be the sole ruler of Equestria..." A servant approached her and said "Are you ready, ma'am?" Nightmare Moon said "Yes I am. Project Moon-T commences now!"