Luna felt great. Her entire body was different. It was stronger and more durable. It was dark in nature, but her thoughts were still her thoughts. They were not being controlled. She had a new alliance because it made sense. Following Twilight, or rather, Queen Twilight would be the best way to secure safety for her ponies. Even if it was, messy.
“Luna, how do you feel?” Twilight asked with a happy smile. If not for the complete change in her body, it would be hard to tell this Twilight from the Twilight that nearly had a panic attack over a tardy report.
“Fine, different, but fine,” Luna replied as she examined her new body.
“Good,” Twilight said in response. They were silent for a while, just sitting in the darkness. The same darkness that was going to save Equestria. Until Twilight finally spoke up once more. “Once Celestia finds out what happens, she is either going to break down into tears or try and kill me, and you, possibly. If she does the later, just hold her off until I can get my crystals around her.”
“What ever you need my queen,” she said as she stood up.
“You don’t have to call me queen, you are a princess, you call me by first name, same with Celestia,” Twilight said as she also stood up.
“Okay then, Twilight,” she said as she stretched. “My sister is coming, we should probably run,” Luna said as she tried not to panic as pointed out the sun that was not there five seconds ago.
“Hold her off,” Twilight said as she turned into a mass of shadow. Darting in the opposite direction of the sun that was now shooting bursts of light at them.
“I’ll try,” Luna said as she shot magic attacks of her own.
Once Celestia touched the ground, crystals grabbed her legs. Making moving Impossible. She flared her horn, teleporting close to Luna and punching her in the nose, making it bleed. In response, A series of cry crystals shot straight in Celestia. Making her stagger back from the pain. Then Luna activated a spell and disabled her magic. Twilight teleported right behind Celestia and knocked her out.
“You know, out of the two of you, I would have thought that you would be the one to act with violence,” Twilight said as she examined the unconscious form of Celestia.
“I probably would have done the same if my sister was taken from me,” Luna said as she took the crystals out of her sister.
“Fair enough,” Twilight said as she restrained Celestia.
“So, what do we do now?” Luna asked.
“Simple, we have to make her give in to the darkness willingly, or else she will lose all sense of awareness. To accomplish that, you are going to appear in her dream and, given that ponies in dreams tend to do anything, convince her to give into the darkness,” Twilight explained.
“It’s worth a try. Will that submission transfer over to the real world?” Luna asked, confused.
“It did with you,” Twilight said back. “Now hurry, before she wakes up again.”
“Okay then,” Luna said as she flared up the spell, her body collapsing.
Celestia awoke with a gasp. She was back in the castle of the two sisters. Everything seemed to be in order, so she started to walk down it’s decaying halls.
“Wonderful night, isn’t it?” Luna asked, appearing right next to her. The logic part of the brain isn’t very active when somepony is sleeping, so this should be easy. Luna thought with a smile. \
“Yes, it is,” Celestia said in response. She didn’t even flinch when dark crystals started to move up her body.
“Isn’t dark magic the best,” Luna said, really hoping that would be enough. Much to her delight, Celestia said:
“Sure, I guess,” Celestia shrugged.
“Would you mind if I converted your body to darkness?” Luna asked, amazed at just how easy that was.
“Go right ahead,” Celestia said, having no idea just how substantial that was. Luna grinned. Activating her horn. Giving the message to Twilight to corrupt her sister. The dream faded away, leaving the black, empty void, around them.
“So, the process can begin?” Twilight asked, moving over to Luna, who was still a little out of it, due to just being in a dream.
“I think so, yes,” Luna said, standing back up. Twilight grinned as her horn came to life. Glowing a dark red.
“Then stand back, this can get messy,” Twilight said before she was completely encased in her magic aura. Along with Celestia.
Twilight watched as Celestia’s coat turned a lime green. Her mane changing shape entirely, now acting like a very thick, purple liquid. Everything was going fine. Until a white light came from within Celestia. Starting to remove the darkness. Twilight’s expression hardened. She was not going to lose. Black flame started to flare around to two individuals. Celestia’s wings ignited with a mix of white and black flame.
At first Twilight didn’t know what to do, her magic and the light of the sun were completely equal. Then a brilliant idea struck her. She now focused her energy to killing Celestia. Come on, take the bait! Twilight silently hoped. As if to answer her prayer. The massive light started to die down. Having to split between keeping her alive and not letting her be eaten by the darkness.
With that, Twilight activated another spell. One that would use the pain of locking one’s sister up on the moon. With this extra boost, the darkness won out. Her wings became solid black and made of fire. Her eyes became nothing but black. The crown she was wearing shattered into pieces. Along with the light of the sun.
As the massive arua died down. Twilight and Celestia both fell to the floor.
“Are you okay?” Luna said as she rushed over to the two.
“Yes, I’m fine,” they both said in unison.
“Are you sure, my teacher?” Twilight asked as she stood up. “Your now a being of darkness.”
“Yes, I’m fine,” Celestia’s eyes gained a green orb. “My queen.”