Blood Moon

Once Fluttershy got to the castle of the Two Sisters, she headed into the bottom most bowels of the place in the event that the Everfree Forest was immune to the magic that Celestia and Luna used to move the sun and moon. Even though she was in the bottom of the old castle, she could tell that it was indeed immune as it began to get a bit light. She quickly hid in a cavern to avoid any kind of light maybe striking her.

She then wrapped her tail around a beam in the ceiling and wrapped her wings around herself before going to sleep. As she hung there, she couldn't help but feel a sense of satisfaction that she had killed many ponies, including one that gave her much stronger powers than anypony else. Her thoughts would then turn to the Crystal Empire and three certain royal ponies that she could wipe out, one in particular that would give her powers beyond imagination.

After many hours of sleep, the vampony woke to notice that the light was fading so she left the castle and took flight to the north. She was unsure exactly how the day/night cycle worked in the Empire but figured that if it was dark in the arctic region outside of the Empire, that it would likely be dark inside the dome as well.

After having to hide in a cave for one night, Fluttershy finally reached the dome and when she crossed through, she saw a tiny bit of light coming from the western horizon and this pleased her. She knew that she would have more than enough time to hunt the royal family and if she was able to wipe them all, she would be able to feed on some of the crystal ponies as well.

That night there was a festival being held in the Empire and the royal family was out mingling with their subjects. Fluttershy licked her chops when she saw them. She then began to wonder which one she should go after first. She knew that Shining Armor was strong physically and likely had powerful magic but given that Cadence was an Alicorn, she set her sights on her first.

As she was flying over the festival, multiple ponies began looking up and wondering what was flying over them since there were no aerial creatures of that size in the Empire, just smaller birds. Finally Fluttershy saw Cadence talking with some other ponies and much to her delight, Shining Armor and Flurry Heart were clear over on the other side of the festival. She began to circle around the princess causing her to look up, "What was that?" she asked.

One of the crystal ponies looked up and asked, "Is that a pony/bat hybrid?"

Cadence looked closer and yelled up, "Fluttershy, is that you?"

Fluttershy let out a hiss before swooping down and knocking Cadence backwards. Immediately she sank her fangs into her and began to feed. She was crying out in pain while the crystal ponies were running away in a panic. This quickly got the attention of Shining Armor. He ran towards her and yelled, "Cadence!"

He would be horrified when he saw what was happening to his wife. He grasped Fluttershy in his aura and ripped her off of her. When he saw her though, he would be shocked to see that no longer was she a pegasus, he saw that she was an Alicorn vampony. While her new form did shock him, it did not lessen his anger or his desire to put her in her place. He began to shake her, "You will NOT kill my wife you vermin!"

Fluttershy shot a bolt of energy out of her horn and hissed, "Vermin? I'll show you vermin!"

She pounced on him and took him down before sinking her fangs into him and beginning to feed. Like Cadence, he was screaming in agony but unfortunately for him, his wife was too weak at this point to even get up, much less use magic to try and at least scare Fluttershy off. Another pony however would be close, Flurry Heart. She was not sure exactly what was happening to her father but she knew that the figure on top of him was causing him harm. She began to fire energy towards Fluttershy but much to her dismay, the vampony put up a protection bubble to make sure she finished her meal.

Once she had finished off Shining Armor, she decided that rather than going to finish off Cadence, that she would attack Flurry Heart. She knew that if she could feed on and kill her, that the magic that would be flowing through her would be immense, so immense that nopony would be able to stop her. She took to the sky and began to pursue the baby Alicorn.

Flurry was firing energy at Fluttershy but given her enhanced senses and agility, Flurry simply couldn't score a hit on her. Fluttershy would then begin firing energy at her as well but like her, Flurry was very agile and would move out of the way before being struck. As she laid there clinging to life, Cadence saw what was going on and said, "Come on Flurry, I know you can do this!"

Fluttershy finally struck her with a powerful bolt of energy, causing her to fall out of the sky. Flurry crashed right next to her mom and was screaming in agony as she had broke a few bones upon impacting the ground. Fluttershy had a sadistic grin on her face as she hissed, "Now to feed on the baby before finishing off the mama!"

Cadence tried to fire some magic at Fluttershy but simply couldn't get her horn to power up. Flurry let out a painful scream as Fluttershy sank her fangs into her and began to feed. As she was drinking the blood of the infant, she could feel immense amounts of magic flowing into her, magic that was making her stronger and stronger. Given her small size, it did not take long for her to fall to the vampony.

Fluttershy then knelt over Cadence and hissed, "And now to finish off the royal family!"

Cadence let out a scream as Fluttershy again began to feed on her. It would not be long until Cadence would fall silent. Fluttershy sniffed her to make sure that she no longer drew breath before doing the same with Flurry Heart and Shining Armor.

Once she confirmed that nopony in the royal family drew breath, she took flight and began to feed on the crystal ponies that had not hid in their homes. She felt on top of the world as she was able to kill pony after pony without even having to worry about a pony with magic trying to stop her. After she had fed on twenty crystal ponies, she saw that it was beginning to get light so she quickly took flight and went into the crystal castle.

She quickly got into an interior room where no light could reach her. She began to wonder if she might be able to wipe out the whole Empire or if she should return to Ponyville to feed on any unicorns that may still be in town. One thing she did notice is that the blood of the crystal ponies was sweet, very sweet. At that moment she decided that rather than heading home, she decided that she would remain in the empire and continue to feed on them until she wiped them all out.