Scream watches the two visitors disappear from her world and then reclines on the closest pile of bones which reveal their couch-like properties. Reality has no place here and things are what the golden alicorn wants them to be.
She smiles to herself. Bringing Void back worked out well enough despite even the alicorn amulet and Neighcronomicon not having enough power to bring him back fully. At least one small worry disappears from her mind and she can focus on other important things. She summons another pony soul whose nighttime desire will sate her. Scream gives back as well as takes though, the ecstasy her victim will feel in the real world might make a mess in the bed but there never was anypony who complained.
The feeling of somepony entering her world without invitation makes her look at the entrance lazily.
A hooded, purple unicorn comes closer and reveals her face with two bleeding holes where eyes should be.
"That doesn't look healthy," comments Scream.
"Even with your amulet, the magic takes its toll," answers unicorn Twilight Sparkle.
"Why are you here then? I doubt we share the same interests regarding leisure time."
"Those travelling spells made by Star Swirl the Bearded are too limited in duration and even with the amulet I can't make them last much longer so I need you to teach me different magic."
"And if I refuse?"
"Nothing... I have no idea why you've been helping me up to now."
"Let's keep it that way. My abilities are however impossible for you to use with one exception. Would entering dreams be enough for you?"
"I don't know, it depends on what the king finds useful."
"This will have to suffice but teaching you will not be free this time. On top of which it might bring Luna's attention to you."
"I don't have anything and princess Luna is dead on our side."
"I forgot. Well, when two unusual companions ask for your help in travelling to the other side then help them, that's my price. Star Swirl's spell should be able to take them with you when you're going back. First things first though - has the Nightmare Night plan worked?"
"Yes, Celestia ordered to have the Elements of Harmony locked away in Canterlot treasury. The bearers are out of the way."
"Good. You know what to do."
"Is that all?"
"Yes. You can go home and tell your little crystal king that you've done his job again."
"Thank you."
Unicorn Twilight leaves and Scream is left alone to think about her next step. Her pawn is getting very powerful but still nowhere close enough despite all her help. Scream curses Celestia once again and her lack of responsibility which caused all this mess. With her most powerful allies - the original alicorns of magic and time lost, it is up to Scream to clean up.
And then there is always Void. He will do what she tells him but death is a fidgety force which might harm her efforts as well as help them. Scream thanks the heavens for a lucky spark causing the Element of Magic to reincarnate on this side of Equestria. If it weren't for that then everything would have been over long time ago. Unfortunately the Element is in the hooves of Celestia's apprentice who eats her every word and is too weak to make the neccessary difference.
Speaking of the devil, Scream's world allows one more intrusion, this time with her blessing.
Five ponies and three alicorns appear from nowhere. Two of the alicorns are unphased and walk towards the main couch-pile while the other visitors look in horror at the decorations. Scream grins to herself.
"Long time no see!" starts Scream cheerfully. There is no reason to act unfriendly from step one despite it being obvious the friendliness is one-sided.
"I'm here to ask some questions and the other are here so I don't have to repeat it later. What's your price?" asks princess Celestia.
"Ask away and I'll tell you if you ask something that requires payment."
"What do you know about Void's escape?"
"Very little," compared to good, old, honest Void, Scream has no problem with trivial matters like lying.
"Where is he now?"
"Still in Canterlot."
"How can we stop him?"
"Stop him from what?"
"You should know that better than anypony. I don't want his slaughter to continue."
"It's been a while. Perhaps he's cooled down."
"Massacre is what he exists for."
"You have no idea how wrong you are, have you?"
"I have a good memory and clear judgement while yours is clouded by your feelings."
"Say what you will, my only advice for you is to leave him alone. There is nothing you can do that would result in a positive outcome."
"I see you still haven't grown up and can't do the responsible thing."
Scream scowls. Is the fat cow really going to lecture her? Cool head is the only thing that can help her in this situation though.
"I can't grow up and think I'd retain my youthful complexion."
"I'm still waiting for the day you're able to take things seriously."
Hearing this twice in one day could test the patience of a saint.
"Get on with the questions, I'm not interested in having a chitchat," Scream rolls her eyes.
Celestia sighs in a manner of someone dealing with a stubborn child.
"Alright. Who was the impostor from Nightmare Night?"
"Twilight Sparkle from the other side."
"What does she want?"
What is the best way to put it?
"She wants the Element of Magic."
"Why?"
"If you want to know that then pay the price."
"What do you want?"
Scream looks around, trying to think of something completely impossible for Celestia to accept or something useful enough in case she actually agreed.
"I'm hungry and that brown earthpony in a cowboy hat looks fun," Scream finally decides. Taking out one of the Elements could give her the extra time she needs.
"No," replies Celestia immediately.
"No deal then."
"You can take me instead of her, for one night."
"How noble, get out!"
"So you're going to let all this happen and possibly cause the deaths of innocents."
"You really have no idea."
Celestia turns to the assembled group.
"Let's go. There is nothing more we can do here. I was foolish to think this would be useful."
Luna looks at Scream accusingly. She knows somepony was blocking her tracking attempts after Void's escape from castle gardens and there is only one being with such power. Scream doesn't bother denying anything and just beams at her widely. When everypony else disappears, Luna speaks out.
"Do you really believe Void won't start killing again?"
"Do you still desire to bring forth eternal night?"
"Oh..."
"Is it all?"
"I haven't told my sister about Void's visit here."
Luna must have gotten way better to be able to penetrate Scream's realm even briefly.
"Good girl, wanna cookie?"
"There's no reason to be nasty. I know I wasn't easy to deal with, I'm sorry for that and I want to offer you help."
The automatic reply of 'go buck yourself' sticks in Scream's throat though. As annoying as Luna used to be when she was young it was mostly thanks to being raised by Celestia who didn't trust other alicorns after witnessing their periods of insanity. Perhaps this is the time for Scream to let past be where it should and look into the future or she might end up like Celestia.
"Then keep an eye out for Void on my behalf, he's going to need every bit of help he can get. Bad things are coming and your sister isn't in the right frame of mind to deal with them."
"Can you tell me anything specific?"
"I don't really trust you so... no."
"I understand, see you later."
Celestia be damned, if Luna proves to be useful and trustworthy then...
... no more overthinking things.
Scream's golden horn glows pure black and a very happy pony appears before the pile of bones and begins climbing towards Scream to recieve his reward. The pent up energy in his body is released and when his skeleton drops on the ground Scream is just hoping Luna is watching her victim's wet dream and enjoying herself as well.