Awww, so cute~
I mean, after a while you might be internally screaming, but still.

I'll post the Stories out-of-order, but I'll sort them in chronological order in the chapter list.

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In an attempt to eliminate SCP-682...

"......?" SCP-3,000 stared at SCP-682, who was staring back, unamused. 3k was Thaumiel though it acted Safe[most of the time], and 682 was Keter. For the first time since it was contained, 3k was allowed to see another being besides humans in white lab coats or SCP-963-131. It was clearly happy.

3k made excited squealing and squeaking noises as it approached 682, smiling happily. It was reasonable that it had some trouble speaking properly after so long in isolation. SCP workers were watching from the security camera, jotting down notes on every little movement either of them made.

682 responded to 3k by growling. 682 stood upright, studying the new visitor. As if 682 no longer saw 3k as a threat, he began circling it. 3k stood, turning in a circle as 682 examined it as if it were prey. 3k ran up to 682 and made a purring sound, as if in a greeting.

682 growled again, and hissed, his gaze narrowing. 3k purred again, holding out a hand in greeting. 682 ignored him and turned to the camera, as if he knew that workers were watching. "...you people have no decency..." it growled flatly, motioning to 3k, who now looked confused. 682's voice was rough and dull, as if it had been worn away to jagged ridges.

3k sat down, getting more curious by the second. 682 still showed no signs of being passive towards 3k. Years of failed tests on it did numbers...hence why he was impossible to destroy. Its name was accurate, as 682 could easily enter other people's dreams.

Suddenly, 682 turned and bolted towards 3k. He hit 3k with so much force that he knocked them both over. "HAH!" 682 sneered, grinning wide-eyed at 3k's expression. "AND THEY SAY YOU'RE THAUMIEL?!?!"

"Actually, 682..." a voice spoke through the loud speaker in the corner of the room. "3k is Thaumiel for a reason. I will not tell you why, but soon you will find out first-hand why 3k is classified as Thaumiel."

3k's eyes had gone from red-white to pure black. He was clearly scared. 682 growled, pinning 3k to the ground. His tentacles held his arms and legs down as he gripped one of his ribs. 3k shrieked in agony as 682 snapped one of his ribs, breaking it clean off. The poor skeleton had nothing on him to protect him.

The workers were shocked, wondering why 3k wasn't attacking. Suddenly, 3k went limp. The workers all backed away from the walls, taking their guns in case 3k got loose.

3k kicked upwards, nailing 682 where his stomach would be. Taken by surprise, 682 froze up. That gave 3k time to get out of his grasp and pin 682 onto the wall, both eyes target symbols. An overly large knife appeared in his hand, the words "X" and "OVERWRITE" glitching over him in various places.

682 was too stunned to react as the knife went through him.

He shrieked in pure agony as it burned him from the inside out. His vision went to white and red blurs, unable to control his own movements anymore. He felt his body relax, but something was controlling him as if we were a puppet. He turned to what he guessed was the camera and stretched out his arms, as if saying 'look at me!'. Was this why SCP-3,000 was Thaumiel?

The thought of beging controlled by someone else scared him. 682 tried to speak, but no sound came out. He tried screaming. Nothing. There was no sound, he couldn't see, but he could feel. He silently hoped that he was just under a new kind of drug. Maybe he had an outburst and they were just trying out a new kind of drug on him. Yeah...that was probably it....

"...I'm...." he heard a soft, broken voice say quietly. He could see again. He felt warmth seep back into his limbs. He hissed and backed away from 3k. "...I'm... I'm...s-sorry...." he collapsed, crying. "I'm sorry! I'm sorry! I'm sorry! I didn't mean to! I'm sorry!!!" he sobbed, hugging himself.

682 slowly approached 3k, wary of him and wondering if he was going to lash out again. 3k sniffed like a pathetic D-Class about to die and looked up at 682, tears rolling down his face.

Since he was still, 682 got a better look at 3k. The skeleton had nothing on, leaving him open to any harm. His ribcage had many scars on it, and his arms had small cuts on them from his wrists all the way up to his shoulders. There was a burnt, charred circle on his neck, is if he had worn a tight collar for too long, and it had somehow burned him.

3k was sitting cross-legged on the ground, looking at 682 guiltily. "....I-I'm sorry...." he said quietly, looking down. 682, for once, didn't snap anyone's neck. He sometimes found out things he wanted to know about the victim before he killed them. This was sometimes used to interrogate D-Class. He wanted to know more about 3k.

682 sat down about a foot away from 3k, forcing himself to relax. This was no surprise to the workers. They were used to 682 playing innocent to find out more about someone. "...how are you able to do that?" 682 asked, pretending to not care.

"...I...It's not me...it's-...I-I don't know...I-I just can't control when it happens...." 3k said quietly. He never opened up to anyone, let alone a Keter who was close to killing him, before. "...can you please stop holding....that?" 3k glanced at his own broken rib, which was still in 682's hand.

682 dropped it, not realizing he had been holding it. 682 suddenly smirked. "Hold on..." he said, picking it up again, making 3k flinch. 682 moved closer to 3k and held the rib to where it once was. 3k began whimpering, the contact hurting him.

682 ignored his whines of protest as he curled his hand around the broken connection between the two bones. 3k began whimpering louder as some of the mass 682 was made of seeped into the cracks between the bones. 3k began screaming in pain. The workers leaned closer to the camera, trying to get a better view.

3k stopped screaming, and only whimpered. 682 let the black stuff seep into the bone, turning part of it black-gray. After a few minutes, he leaned back, looking slightly proud of his work. He had somehow re-attached the rib back onto the ribcage. 3k was stunned, his eyes shaped like stars.

He rammed into 682, squealing nonsense. Since English wasn't his first language, he went back to his actual native one. He seemed to be saying thank you. He knocked 682 to the ground, hugging the gooey black monstrosity. 682 looked like he was having a panic attack, having never been hugged before.

He was internally enjoying it.

The workers expected him to snap 3k's neck, or do anything to fight back, but he didn't. Instead, 682 actually showed affection. 682 slowly and cautiously wrapped his arms around 3k, sitting up. 3k purred loudly, sitting comfortably in 682's lap.

682 gazed at 3k curiously before petting the back of his skull. 3k purred, nuzzling his face in 682's chest. The staff let 3k stay with 682 and fall asleep on him.

They came to collect 3k soon after, leaving 682 alone. He wanted to see 3k again, liking his company.

Well....there were always other ways he could contact 3k.

682 immeidately fell asleep, something he could naturally do whenever he wanted. He stretched out his consiousness, trying to find 3k's. ....hmmm....

 He found if somewhat hard to find 3k's mind, since he was awake. He must have woken when the workers picked him up. He tugged at it, trying to pull 3k into unconsciousness. He sensed 3k's fear from the unusual sensation. 682 didn't know where 3k was or what he was doing, but he hoped that nothing bad would come out of it.

682 realized that 3k was terrified. He forced his consious to feel more relaxed and comforting. It curled around 3k, pulling him into sleep. 3k relaxed, letting 682 drag him into sleep. Once 3k was fully asleep, 682's conscious seeped into 3k's.

3k began to radiate fear, not liking what 682 was doing. 'Don't fight it,' 682 hissed, forcing himself into 3k's dreams. 3k relaxed, as if recognizing that it was 682. He calmed down, no longer fighting 682 and letting him in.

3k's consciousness pressed against 682's, trying to seek comfort. Suddenly, they were both shoved into a dream. They appeared in a foggy meadow, only in black, white, and shades of gray.

3k fell face-first onto the dew-covered grass. 682 landed more gracefully, actually landing on his feet. He helped 3k up.

~~~~~682's P.O.V.~~~~~

3k purred and hugged me, cuddling into my chest. I hugged him back, refusing to let go. "Hm?" I noticed that 3k was curled up in a tight ball, nervous. "What is it?"

"I've rarely had a good night's sleep..." he said quietly. "I ha-have n-night-nightmares....c-can you let me h-have a peaceful n-night?"

"Yes..." I said soothingly. Not only could I give people nightmares, but I could also take them away. I pet his head and cradled him in my arms. His eyes fluttered closed and he relaxed. I gently pet him, letting him nuzzling himself into me, comfortable. 3k squirmed, whining. "Shhh~" I cooed softly. "Shhh, you're safe~" 3k immediately grew comforted. Well...that was easy.

"M-my name.....i-is..." 3k murmured something, almost too quiet to hear. "Cross..." Cross. I nodded and pet his head, letting him nuzzle himself into my chest, trying to get warm. He soon fell asleep, smiling in his sleep.

I looked up, examining Cross' dream world. I wonder why he claimed to have nightmares...-

Oh.

That's why.

The white ghost stood at the edge of the fog, its white eye piercing through the fog. It looked like an 11-year old, but at the same time, it looked demonic. I couldn't tell if it was male or female.

"Cro-oss~" they cooed, staring at him asleep in my arms. "Wake up, Cross~" the fog around them turned black, sucking the life out of the clearing. Everything turned dark, and Cross began whining.

"...n-no....." he whimpered in his sleep, clutching me tight. I growled at the demon-child, curling my tentacles around Cross' body.

"Stay back...." I growled. The demon-child glared at me.

"He brought a friend along~?" they asked, stepping closer. "How  cu-"

They screeched as the tentacle went through them when they stepped close enough. Purple blood seeped from the wound. The demon-child hissed and backed away, going into the black fog. Silence. The darkness left, and the fog returned to normal.

Cross' whining stopped and he smiled softly in his sleep. I closed my eye and I eventually fell into unconsciousness.

"682. Wake up, 682."

I jumped, forced awake by the voice in the loudspeaker. I stood up, back pressed against the wall. A large dent was in the wall across from me, from when I had shot the demon-child. Had I really done that in my sleep? How did I even reach that far?

I warily glanced around, disoriented. I blinked, trying to get the facts straight. Cross. He was alone in that hellhole with the demonic demon-child. I snapped towards the door where D-Class would come in. I barely knew my way around the foundation, but I didn't want to leave Cross with the demonic child.

I slammed myself against it, wishing it wasn't steel. The voice from the loudspeaker was shouting things I didn't pay attention to. The door burst open and several Class-D emerged. They fired the guns so suddenly it startled me, the sudden loud noise making me back away.

"GET BACK!!!" one of them shouted, holding something that resembled a tranquilizer. Not very tranquil....not at all. He fired, narrowly missing me. Too bad they had closed the door, or else I'd already be gone.

I quickly and easily killed them all.

Their blood stuck to me, clotting up. I took the one who had the tranquilizer and let the weapon be absorbed. One less thing to sedate me with. I got rid of the rest of the weapons, kicking the bodies into a corner. The smell got horrible pretty quick.

"SIX EIGHT TWO!" the voice roared. I growled, backing off. Now that my thoughts were straight, I could actually plan something. I sat back down, leaning against the wall. "682, calm down!"

I growled, but didn't move. "Very good. The door is about to open. Do NOT attack the staff. If you don't, you will be rewarded."

Yeah, rewarded. As in, not being tazed, burned, and drugged. I hissed as the door slid open. Several D-Class stepped inside. They had tranquilizers and other things to bound me with. "You are going to be sedated. Don't fight it."

I let them numb me. I was still wide awake, but couldn't move. It felt similar to when Cross stabbed me...it sounds worse when I flat-out think it. They clipped a collar around me and  dragged me out the door. I was going somewhere? Huh....now I was curious.

The long white halls seemed like a maze. They led me corridor after corridor. I tried to map it out in my head, but the drugs wouldn't let me. One of the D-Class injected something into me. Oohhh.....I feel wweeeiiirrddd.....

~~~~~3rd P.O.V.~~~~~

They dragged 682 to Cross' chamber. Whatever had been injected into 682 made him act as if he were high off of something like marijuana or ecstasy. Cross looked out of the glass. He had been messing around with a Rubik's Cube. He was allowed some 'nice' things. Still, though, he had no clothing.

The door to Cross' chamber opened and 682 was thrown in. He hit the hard ground with a thud. Cross immediately went to him, dropping the Rubik's Cube. 682 blinked slowly, tired. Cross poked him, wondering what in the world they had put into him.

"Hiiiiiiiiii......" he slurred. Cross tilted his head to the side, his little tail flicking slightly. 682 sat up and got on top of Cross, hugging the smaller skeleton. Cross squirmed as 682's weight pressed down on him. He eventually got used to it, giving into the warmth.

682 could barely keep a solid form. He was half-melted onto Cross, sticking to him and nuzzling into his chest. Cross stayed down on his back, waiting for 682 to fall asleep. Tingling sensations shot through him, making him want to laugh.

682 noticed and slid off of Cross in a tar-like puddle. Cross poked him, curious. Secretly, everyone watching them through the cameras were laughing their arses off. It was hilarious to watch the high as fuck Keter-Class interact with the very confused Thaumiel.

Cross picked up the half-finished Rubik's Cube and set it the puddle. 682 completely absorbed it. Well, that's never going to be seen again. Cross set his hand in the puddle. 682 slid up his arm in response. Cross lost it, bursting out laughing.

The large black mass got on top of Cross again, unknowingly tickling him. 682 liked the sound, though. Cross rarely laughed, and it felt great. 682 grew tired and stopped moving. Cross sat up, holding the gooey thing as it dozed off. He purred in content. Cross picked 682 up, which was hard considering how unstable the other's body was. He managed to sit against the wall, 682 making himself comfortable in Cross' lap.

Cross shivered at the odd feeling as 682 pressed against him. He felt the sensation of being tugged into sleep by 682. He gave into it, closing his eyes.

~~~~~Time Skip + Cross' P.O.V.~~~~~

I slowly woke up the same time 68-...Nightmare did. I'm going to have to get used to calling him that. He went back to a more solid form, clutching his head. He was still sitting on my lap. He glanced around, confused. "Ugghh...." he groaned, closing his eye.

I pat his head. "Are you okay?" I asked.

"Wha- WHEN DID YOU GET HERE?!" he fell backwards off of me. I giggled and pulled him into an upright position.

"They drugged you with a weird thing and let you in my chamber," I explained. "You got all gooey!"

"I do that sometimes...." he shrugged. "Whenever I can't think straight. What else did I do?"

"You..." I paused, thinking on how to put it. "...I dunno what you did but it made me laugh. You alse ate a color-cube."

"...sounds eventful," Nightmare stood up. "Want to help me get out of here?"

"Sure?" I shrugged and stood up. "Do you at least remember when we appeared in that dream world again?"

"I did that while drugged? Huh, good job me," Nightmare looked around the room. He grinned. "Vents. C'mon."

"Huh?" I asked, following him. "The vents ar-"

"Sh. Our language. So they won't know," he shushed and glanced at the camera, reverting to our language. I nodded. The language didn't really have an official name- so the others else just called it 'our language'.

"The vents are up there," I pointed out, looking up. There were close to the ceilling, and I had never actually paid much mind to it.

"Well. Get on my shoulders," Nightmare said. "You get a good grip, and I can do the rest."

"Umm...okay..." I said, unsure. Surely I wouldn't be able to balance on his shoulders, but I didn't protest. Once I was steadily on, I felt some of the black goo curl around my ankles and tighten, preventing me from slipping.

I somehow managed from getting a good grip on the edge. "I-I got a grip..." I said, straining not to fall or slip. I froze and squeaked from the odd feeling as Nightmare went into the goopy-semi-puddle-like state. I cringed as he climbed me. He curled around the vent's bars, keeping us both from falling. One by one, he unscrewed the bolts. The vent hit the ground with a loud clang.

"We need to be quick before anyone notices!" Nightmare hissed, entering the vent. He gripped my arms and pulled me up. I hear voices shouting things below us. Nightmare shoved me in front of him. "Go!"

I stumbled blindly through, painfuly aware that Nightmare was being shot by numerous things. Hopefully he didn't pass out. We came across another vent. Nightmare ripped it off and pushed me through. I fell into an unknown place. I looked up to see that Nightmare had put the vent back in place. What was he doing?!

Oh wait...he just slid through the bars. He landed beside me. He was clutching his head, groaning. He looked like he was about to collapse. I let him lean on me as we observed the area.

"Where are we?" I asked, looing around. It was a hallway.

"....uuggghhh...." Nightmare lost his solid form, sticking to me. He curled around me like a blanket, trying not to pass out. He didn't even look like something sentient. He was warm and cool at the same time. He stopped moving, finally passing out while curled around me.

I wasted no time and bolted through the halls, making sure Nightmare didn't fall off. I eventually had to stop, Nightmare's dead weight making me slower. I was right by a chamber; maybe someone could help. I glanced at the sign.

SCP-134: "The Mono-Colored Child"
Object Class: Euclid

I immediately opened the door and darted through it, slamming it shut behind me. It clicked and it automatically locked from the inside. "Hello there."

I screamed as the gray human scared the life out of me. Nightmare nearly slid off of me. I backed up against the corner, then remembered that the sign said that 134 was Euclid. They weren't going to hurt me right away. Plus, they seemed harmless. "Greetings. I apologize for scaring you. I tend to do that, due to my appearance. My name is Frisk, but I would prefer if you would call me Core. Here, I am known as SCP one-three-four."

"H-h-hi C-Core.." I said shakily. "A-are you going to hurt us?"

"I do not mean to be rude, but you have not told me your name yet, skeleton."

"O-oh....I'm Cross. Th-this is Nightmare..." I cautiously said. Nightmare shifted. finally begining to wake up. I internally begged him to not kill the mono-child.

"Why do you have no clothing on, Cross?" Core asked. "And if I remember correctly, you are Thaumiel and Nightmare is Keter. If anything, I should be the scared one here." Core's echoing voice had a hint of taunting humor in it.

"....I-I don't normally attack others..." I said slowly, not really wanting to tell them. "Only if I-I'm mad or scared... I'm not allowed clothing..." ....anything can be used to hurt someone. Anything.

"That is logical, except for the clothing part. I will ask about that later," Core nodded. "And Nightmare? He does not seem very threatening."

"We escaped...he got shot with some sedatives in the process..." I sighed as Nightmare fully woke up. He slid off of me, returning to his solid form.

"....don't worry..." he groaned. "I heard everything...I don't know what they shot me with but I was awake the entire time, just unable to move..." he turned to Core. "Now help us get out of here or else I will rip your insides out. Y'know, I haven't killed a kid yet...."

"Threats are not needed," Core said simply. "That is because every guard from the retrieval and sedative unit are behind you right now."

They turned and went back into the corner of their chamber. They kept their void-like gaze on us, their face expressionless. Actually, there might've been a hint of a small, amused smile.

Nightmare snapped around, going full genocide. He got shot, but was not harmed by the bullets. He was immediately on rampage and genocide, not hesitating in harming the guards.

I, however, was another story. Something got me in the right eye socket and exploded. I blacked out almost immediately from the unbearable pain.

~~~~~Nightmare's P.O.V.~~~~~

I had killed of a good amount of them when I heard Cross shriek. I snapped around, distracted. Someone had fired something into his right eye socket. It exploded, taking a good portion of his skull with it. The light show was blinding. The unit of guards froze, staring at it in shock. I took my chance, grabbed Cross as he collapsed, and fled. I was the only time I had ever backed off from a fight.

Cross was knocked out, as expected. I couldn't think straight. But....something was tugging at me. Wanting me to get closer. Having no other option, I ran towards it. Cross' HP was depleting fast. He was not going to die. Not as long as I'm still alive.

I ran a door down, not stopping. Well, now I had stopped. I collapsed, clutching Cross tight. "Thank you thank you thank you..." I whimpered, setting Cross down at the base of the tree.

For once, something truly scared me. Seeing Cross with half of his skull missing, and his HP still dropping... "B-brother pl-please..." I quietly begged. Please help him...

Lord....I would give so many things to know how to heal. I could only murmur soft nothings as the area around his skull began glowing green.

~~~~~3rd P.O.V.~~~~~

"WHY DID YOU SHOOT 3K?!?!" one of the D-Class snapped.

"How was I supposed to know I wasn't supposed to shoot him?!"

"IT SAYS IT ON THE DAMN GUN, YOU IDIOT!!!"

"WELL WE WERE GOING TO DIE!!! IF ANYTHING, YOU SH-"

"LOCKDOWN! LEVEL THREE LOCKDOWN!!! THERE HAVE BEEN TWO BREACHES!!! KETER AND THAUMIEL!!!" a voice shouted through the loudspeaker. "EVERYONE HAS TWO MINUTES TO FIND A SECURED AREA BEFORE GUARDS ARE SENT OUT!!! GUARDS WILL SHOOT ANYONE ON SIGHT!!!"

Everyone looked at each other for a moment before scattering in different directions. They did not want to die.

~~~~~Time Skip~~~~~

Nightmare offered no resistance as they sedated him. Well, that might've been because he wasn't letting go of Cross' sleeping body. He would stab anyone who tried to separate them. The staff and guards were confused as to how Cross had healed so fast, or why Nightmare had gone to SCP-038's chamber of all places.

As soon as Nightmare was out, they managed to separate Cross from him. They were going to be put into their own chambers. Cross, once he was 100% recovered, would be allowed to go into Nightmare's chamber. They reasoned that it would help prevent breaches from both of them. But then again, one might breach if the other gets hurt...or they would work together to escape with a plan with fewer flaws.

They threw Nightmare back into his chamber. As soon as he woke up, he was mad...and scared. He tried desperately to escape and see Cross. To make sure he was okay and that he wasn't being hurt.

~~~~~Time Skip~~~~~

Cross was shoved into Nightmare's chamber. It was nighttime, but his begging to see Nightmare had annoyed everyone in the Thaumial wing. Death flat-out left and stayed in Geno's chamber while Seraphim actually asked the guards to shut Cross up. Nightmare was sleeping, hugging himself.

Cross ran to him, ramming into him. Nightmare woke up immediately, swearing. He honestly nearly cried when he saw Cross. He hugged the small skeleton, refusing to let go. A crowd of workers watched from the cameras, wanting to know what the two would do.

They hugged, not letting the other go. Nightmare's tentacles were wrapped around Cross, and he gently pet his skull. Cross sighed in content, nuzzling into Nightmare's chest. Nightmare nuzzled the top of Cross' head, purring. "I missed you!" Cross squeaked, curling up.

"I missed you too~" Nightmare purred, patting Cross' skull. "Have you healed?"

"Yes..." Cross nodded, closing his eyes. "...mm...nnngghh...." he shifted around. Nightmare smiled softly.

"Shhh.....you can sleep...." he cooed. Cross nodded, his breathing slowing. "Shhh..." he nuzzled Cross' skull as he drifted off into sleep. Nightmare closed his eyes, letting himself drift off. For once, he felt Cross' conscious reach out for him. It was a warm feeling. Nightmare responded and embraced Cross tightly, falling completely asleep seconds after.