Luna flew into the cavern in the mountain with the fool Discord flying in with her, his angered face mimicking her own.
How that demon managed to isolate not only the Elements of Harmony, but her sister as well was beyond her. She could not put any conceivable notion to how it managed to trick all of them near the gates of Tartarus, let alone overpower Celestia or Twilight. Thankfully, and she was still in disbelief that she was thinking this, Discord had not only spied on their little outing but decided to get her to face this dream demon instead of just ripping it apart while it fed.
Landing in her full armour without a sound, which only came after years of awkward experiences, she shot the being next to her a glare. She prayed that Discord would remain silent and let her deal with it, as she could simply cut the ties and defeat the demon with her superior mental prowess.
Discord, thankfully serious for once, floated with nary a sound or random act performed.
As the two made their way deeper into this random cavern near the very gates that Cerberus guarded when a certain performer mare didn't 'borrow' him, they started to hear the whimpers.
Growling, Discord started to fly forwards when Luna placed a hoof on his shoulder to calm him.
She briefly pitied the monster that had taken Fluttershy prisoner, but it was a fleeting thought as it had her friends and sister and it would face her wrath once they were safe.
As they turned around the bends, again thankful for Discord as she would have been lost in this massive cave system, they saw both their friends and family and it.
The seven ponies were all on the floor, withering from the demon’s nightmare. The demon had taken the form of a small cloud-like object, with tendrils attached to each of their heads. For Twilight, Rarity and Celestia, the near transparent tendril was attached to their horns and they were thicker on Twilight and Celestia. Already Luna could pick out some signs of battle; with Twilight laying on top of Celestia with Rainbow Dash next to her meant her sister was taken by surprise, with Twilight and Rainbow Dash jumping to the defence. By the few scorch marks, it seemed to indicate that the demon had captured Twilight quickly; most likely because she didn't have a mental fortress ready. The rest of the room showed the same scene, with Fluttershy behind Rarity and Applejack while Pinkie Pie was somehow sleeping cuddling a stalagmite in the air!
With a roar, Discord leapt forwards suddenly. Pulling out a hammer from nowhere and pulsing with chaos magic, he smashed the surprised demon into the ground before Luna could stop him.
“You fool!” she snarled out, flying over to the demon and frowned as she felt the unnatural life from it starting to drain away. “It’s near death now, and we do not have them free!”
“It took Flutters Lulu!” Discord sneered at her, brushing the pegasus’s mane gently. “I know I promised, but I-”
“Silence,” she snapped, pawing the floor. She stared at the demon; she had thought she had banished all of their ilk away in Tartarus long ago but it seems one escaped. “I must go into its realm now and you must keep it alive but out of control.”
“Wait, isn’t that a bi-Lulu!” She briefly saw Discord leap towards her as she attached her own magic strand to the demon’s being.
After that, all went black.