The door opened and all hell broke loose.

And by that, nothing was there in the manmade cave.

"Wasn't there just a roar here?" Isaac asked. "I could have sworn there were noises coming from here."

"Ah don't like this. One second it sounds like a manticore is being strangled, the next, nothing." Applebloom said.

"Well keep your guard up. There's no telling where anything could be."

They all crept along the ramp, watching the shadows. While something else was watching them from them too.

"Down this way, the light and ventilation controls should be down there." Isaac said going down the ramp.

They turned after doing a quick sweep of the area and went under the platform they had currently walked on. Underneath, the cause of the darkness was discovered to be an overloaded power core.

"It looks like all we need to do is put in a new core, and were set." Isaac said. "Now all we need..." He stopped and looked at the crusaders. "Good work. I didn't know you had one."

They both looked at each other before noticing the blue core behind them. They both got out their weapons and went over to Isaac.

"You didn't get that… did you?" He said uneasily.

"No. And that wasn't there a second ago." Scootaloo said.

"Think it's a trap?" Applebloom asked eying the core.

"Maybe, but would you rather be attacked in the dark or when you can see?" He asked pulling the orange core out and putting the blue one in.

When the lights turned on all of them stopped and looked around.

There were holes in the walls, everywhere. Large holes carved into the rock as if giant termites had made a nest there.

"Isaac, did one of those fancy drills make those?" Applebloom asked.

"They wouldn't drill here. Not enough room or even a reason." He answered.

"Then... if a drill didn't make those..." Scootaloo trailed off with a small squeak.

A Puker came out from one of the vents followed by two Lurkers, four Crawlers, two blackened Slashers and an Exploder.

"Get ready to fire wen I say so." Isaac whispered as they got closer.

As the Necromorph's were converging, they stopped and started to look around as if confused.

"What's wrong with them?" Applebloom whispered.

"I don't know maybe-"

Isaac was cut off when one of the Slasher's ran at him. Before he could fire something crushed it. Something large, white and furry.

All three engineers jumped back as they saw the creature from before.

It had a spine tail, spines going down its back, bone plating on its legs and head. The bottom appendages were roundish with three claws sticking straight out. It had a collar of tendrils sticking out from the base of the head and two large blades sticking out from its back. But the head was the most curious.

It was equine in shape and even had a horn. And the eyes took up most of the side, aside from the pointed ears.

"Guy's! let’s just run while-" Isaac was whispering before a Necromorph came out from the vent next to him. "Run!"

They all ran without a second thought, unwittingly right past the creature and stopped in front of the other Necromorph's.

"Well, it was an honor serving with you all." Isaac said.

"Yeah, same here." Applebloom said hugging his leg.

"Me too." Scootaloo said hugging his other leg as he bent down and wrapped them in a hug.

They waited for the end but only the sound of the Necromorph's was heard. Along with a heavy breathing.

They all looked up and saw nothing but orange organs, they looked back and saw the creature's two back legs and the tail curled defensively around them.

The Necromorph's shrieked and raged at the creature while it only snarled.

The behemoth took one of its tendrils and shot a small spike into the Exploder's sac, detonating it in the middle of the small crowd.

The Necromorph from before, a Slasher, quietly made its way behind them all and made its way towards Isaac. Before he knew what was going on, it wrapped its bladed arms around him and started to bite his neck armor.

"Get it off! It's trying to eat my neck!" Isaac yelled as he struggled against it.

Before the two crusaders could react the creature above them swung around with its tail and sent it arching down. It split the Necromorph in half while leaving Isaac standing straight up in fear and shock.

The Crusaders rushed over to him as he snapped out of it. A snort from the thing behind them reminded them of the still immediate danger.

At its full height it stood nearly twice as tall as a Tripod, it was slightly thicker in the front and back. And it just stood there, looking at them, ears drooped down.

"What do you think it’s doing?" Scootaloo said.

"Probably thinking which one of us to eat first." Applebloom whispered. "Eat Isaac! He's nice and fat!"

"Why you little!" Isaac said before noticing the thing. "Wait... maybe it is thinking about that. And I just yelled like a dumbass."

It shook its head side to side before getting down on its belly. It folded its front claws and lay there, staring at them.

"So you’re not going to eat us?" Applebloom asked.

It stuck out its proboscis like tongue in disgust.

"Are you here to help us?" Isaac asked.

It nodded.

"Do you know where our friend is? She's like me and Applebloom, only she's white and has a horn." Scootaloo asked.

The thing lowered its ears again and looked away. It slowly looked back and raised on of its claws, when it did a blade shot out.

"Sweetiebelle..." Scootaloo said going up to it. "Is that you?"

It closed its eyes and nodded, retracting the blade.

"What happened?" Isaac said.

"Isaac, ah don't think she can talk." Applebloom whispered.

"Maybe I can help with that." Scootaloo said.

She jumped onto Sweetie's back and put a tentacle into a clear area of skin. She jumped down as her eyes turned white.

"Um... is this thing on?" Sweetiebelle's voice came from Scootaloo.

"That's disturbing and awesome." Isaac said.

"How did this happen, Sweetiebelle?" Applebloom asked.

"I don't know. Suddenly I was being torn to shreds," Her friends winced. "Sorry, poor choice of words. But anyway, my magic did something weird and I started to take the bodies into me. I absorbed them, I guess."

"She knows how to use biomass." Isaac said. "She can use the other organic material around her to increase her strengths and body. How many corpses did you absorb?"

"Um... a few dozen. Not counting the Tripod's and... it." Sweetiebelle made a low guttural growl. "That thing back at the church."

"Wait, that thing was still alive!?" Isaac asked.

"Not anymore." She said. "I took care of it."

"Were you the one who killed the Stalkers on the ramp?" Applebloom asked.

"Yeah, I didn't get all the parts... did I?"

"No we found a bunch stuck on the walls."

"Wait," Scootaloo said coming out momentarily. "Why did you run away when we saw you?"

Sweetiebelle's cheeks turned slightly darker under the coat of lunar dust.

"You all scared me..."

"We scared you!?" Isaac yelled. "I don't think you really need to be scared of anything. You nearly gave us all heart attacks when you jumped down."

"Sorry..." She scraped a claw across the floor leaving a gash. "Thanks’ for turning the lights back on. It was hard to see."

"No problem. Now, to figure out how to get you back to normal..." Isaac mused.

"Could we just take chunks off? Like an onion?" Applebloom suggested.

"No!" Sweetiebelle yelled standing up. "I mean no. We are not peeling my skin away. It will just regrow."

"So, do we keep going or do we try and figure out how to fix this?" Isaac shrugged.

"Just keep going; I'll find my own way out eventually. I've already made a network of tunnel systems for easy access. I even took into account the soft and harder rock as to prevent a collapse." She then pulled away from Scootaloo, crawled up the far wall and jumped. They all ducked but looked back up to see a thin membrane between her legs as she glided over and crawled into one of the tunnels.

"Now I guess we go up there." Isaac pointed back up the ramp.

They went back up the ramp, took the walkway and opened the door ahead.

The way ahead was littered with loose rock, a few mining helmets and some portable lights.

As they went in something dropped on Isaac, something liquid.

He wiped it off and looked up to see Sweetiebelle looking down at them.

"Hang on, this might be important." Scootaloo said climbing up. She latched on and Sweetiebelle started to speak.

"I'm going to stay as close as I can to you three. Just scream or yell if you need me." Scootaloo's tentacle went back and Sweetiebelle went further into her network.

"Did she really have to drool on me?" Isaac whined, shaking his arms clean.

"Hey watch it!" Applebloom said getting hit with a strand. "Eww... it smells like Isaac."

"Alright, I do not smell that bad." He let his helmet unfold and took a sniffed his shirt. "Alright... I take that back." He rubbed his eyes, unwittingly getting some slobber in them. "Oh sweet merciful god! It’s in my eyes! The smell burns!"

The two crusaders couldn't help but snicker at him.

Ponyville.

It was nighttime, almost all the residents were asleep. All but Alexander, Applejack, Rainbow Dash and Twilight.

"Alex you may need to set up a tent before the morning." Rainbow Dash said.

"What? Why?"

"Ponyville has a storm scheduled for tomorrow. The crops and such need the water." She shrugged. "Listen I need to go and help make the storm clouds, you just try and keep everything together."

She flew off leaving a bright trail in the air.

"Great," he rubbed his eyes. "Where am I going to get a tent big enough for this?"

"No... I don't want broccoli... gross..." Discord snored.

He was laying with his back against his daughters, who breathed in and he snored. Alex rubbed his hooves together evilly as he crept up on his victim.

He charged his horn and a trumpet appeared. He grabbed it and put it right to the spirit's ear and blew.

Discord shot up, his red pupils vibrating side to side as he fell to the ground.

He got up and glared at the human turned alicorn who was smiling smugly.

"Problem?" Asked Alexander.

Discord merely made a choking gesture before looking back at his daughter. He smiled as she was still sleeping peacefully.

"Alright wise guy, what is it?" Discord asked tapping his goat leg.

"There's a storm coming and we need a tent." Alex shrugged.

"Fine," He snapped his talons and a large circus tent went around the vicinity. "Anything else?"

"Yeah, go back to sleep."

He nodded before curling back on the ground with his daughter. After a few moments the snoring started again.

Titan station. Mining.

"So, are we ready now?" Isaac said.

"Ah'm ready. Are yall ready?"

"I'm ready. I'm like even more ready than both of you." Scootaloo said.

"Ok were not starting this shit again. Scootaloo, you follow in the back, Applebloom you’re behind me and in front of Scootaloo." Isaac started to walk off before Scootaloo could give a retort.

As they walked Scootaloo stopped and stopped them both. Her ears were perked up, as if listening for something.

"Let go!" Isaac demanded as he tried to get free.

"Wait... listen. It sounds like, like somepony muttering something." She held up a hoof silencing them.

Isaac stopped and looked around. Sure enough they all heard someone muttering further down.

She let go and they quickly but quietly hurried down the hall.

"That almost sounds like..."

Stross jumped at Isaac from behind a gate, in his hand was the screwdriver with Ellie's eye perched in the middle like an olive in a martini.

Isaac jumped back, a scowl forming on his face; while the crusaders screamed very loudly, jumped back and stood there with angry and betrayed looks on their muzzles.

"There you are, Isaac. We've been waiting for you!" Stross said as if scolding a child. "Now it’s your turn!"

"Oh god, Ellie!"

As if summoned like a genie she stood up from the darkness, a pipe in hand and swung at Stross from behind.

"Step three, then you'll-aaaghh!" Stross cried out as he was knocked to the floor when Ellie hit him in the back of the head.

"Ellie..." Isaac said looking at her.

"You owe me an eye, you bastard!" She pointed a finger at him angrily.

She swung out with the pipe as he tried to grab it, she pushed him away and the gate started to close. It sparked and stopped. Everything started to shake, rocks fell from the walls, and the sound of metal tearing was heard. Even Stross stopped fighting to see what was going on.

"Stross, Ellie, I think you've both met Sweetiebelle." Scootaloo said smiling thinly. "We'll, let’s just say she's gone through some... changes." She turned to Stross. "I'd suggest you start running. Now."

He started to run and just as soon the wall above Isaac was torn away, Sweetiebelle came through and tore through the gate and gave chase to Stross.

Ellie was left there, dumbstruck and angry. She pointed a shaking finger at where Sweetiebelle went.

"That was the small pony... the little fluff ball?"

"It's... it's a long story." Isaac sighed.

She went up to him pressed a button on his helmet, it unfolded and she slapped him.

"Now," She picked up the pipe again. "I've got a psycho to hunt down." She ran off into the darkness, the only sounds were of Sweetiebelle roaring in the distance.

"So... now what?" Applebloom asked.

"I guess we keep going?" Isaac shrugged going through they're original path.

As soon as he opened the door, a Drag Tentacle came out and grabbed him. Applebloom and Scootaloo grabbed him but they both were dragged along. They went through the tunnel, screaming and occasionally yelping when they hit a bump.

Applebloom had enough time when they were grabbed to turn her volume to a hundred.

The ride stopped when they were pulled out into space.

The entire cliff side of the moon had three chambers, two of them containing explosive canisters while the last, guarded by lasers, was the exit.

"Great, I was hoping I wouldn't have to deal with one of those damn Drag Tentacles. Those things are the reason why I can’t have nice things." Isaac said. "That and women, they're also a reason I can't have nice things."

"Excuse me?" Applebloom said.

"You've been nothing but good to me, so you don't count. Ponies do not count." He said raising his hands defensively.

"Hey guy's, we've got a bigger problem." Scootaloo said.

"What?" They both turned to her. "Oh..."

In front of them was a Nest, an active one that was already sending out the small jelly fish like Necromorph's.

"I've got it." Scootaloo rolled her eyes as she killed the little kamikaze Necromorph's and went up to the fleshy bulb.

She wrapped het tentacles around it and did the same as before, all the bulbs popped in a shower of goo. While she did that Isaac and Applebloom had went and found the canisters needed, attached them and were waiting by the entrance for Scootaloo.

Isaac and Applebloom aimed and fired setting off the canisters from afar; before they could go in they were all knocked back by a tentacle. Up above them, the culprit of dragging them, was a Slug.

It tore the front of the chamber off and hurled it at them, Scootaloo grabbed both Isaac and Applebloom and teleported away.

They re-appeared in one of the chamber with an explosive canister.

"Now what?" Scootaloo asked.

"I don't know. I had to have an anti-asteroid defense system to beat the one on the Ishimura!" Isaac whispered back.

"We wait." Applebloom said calmly.

"What?" Scootaloo gave her the most forceful, 'the buck did you just say?' looks in history.

"We can't just wait this out." Isaac said. "We'll run out of air!"

"Ah'm not waitin' for that to leave, ah'm waitin' for Sweetiebelle. Ah might have turned ma speakers up when we were grabbed."

"Then let's hope she heard us." Isaac said.

Further in Titan station.

"Dammit! Come back here and face me like a man!" Ellie yelled chasing Stross around a pipe while Sweetiebelle occasionally tried to trip him with a tentacle as she looked on slightly amused.

She barely registered the yell but still heard it. It distracted her long enough for Stross to escape into darkness.

"Whatever..." Ellie wheezed. "He's as good as dead alone anyway." She sat back on the pipe. "So, what's your story?"

Sweetiebelle let a blade fall out of her hoof and re-absorbed it.

"Ah, you absorbed the Necro's." Ellie nodded. "So, are you going to go or what? Applebloom I think, screamed over the comm just now. Bloody loud too."

Sweetiebelle nodded and tore off, tearing through the wall to her friend.

"Step 3..." Stross called out eerily.

"Would you shut up!" Ellie yelled throwing a glare and a pipe in the darkness.

"Please...?"

"That's it! Come here!" Ellie was getting up when Stross finally ran off. She smiled to herself before going off in a random direction.

Titan station. Space.

"Ok, how long is this going to take?" Isaac said. "Almost everything out there is black!"

"I almost had it!" Scotaloo whined. "Alright, I spy with my little eye... something yellow and hot."

"The sun?" Isaac guessed.

"Nope. The solar array."

Isaac peered out and saw the beam back in its original position.

"Damn."

"Look! It’s Sweetiebelle!" Applebloom called out.

They all looked out just in time to see the rock behind the Slug explode out sending shrapnel into its hide.

It whirled around in time to See Sweetiebelle standing there, lips peeled back to reveal a massive set of double jaws all lined with two rows of either hypodermic or thick, serrated teeth.

It took a defensive stance as it flailed its tentacles. She jumped forward into the tangle and landed on it.

It grabbed her in mid-leap and held her there. She tore at its tentacles, shredding them to bits before landing on it. She buried her claws into it before pouring acid on it, its armor sizzled and melted as it shook uselessly. She leaned forward and started to bite the thing while its soft flesh was exposed.

She tore massive chunks out, each time it was absorbed making her grow. She continued but got bored, so she struck down with her horn and electrocuted it. It tensed up before finally giving out and dying. When it did so, Sweetiebelle absorbed it and grew nearly two and three quarters larger.

She snarled at the three dots coming at her but stood back when she realized they were her friends.

She waved at them as they went by, and they waved back as they hurried in.

Underneath Sweetiebelle.

"Well look at this." Applebloom said.

"More Cyst's. Great..." Drawled Isaac. He looked up at Sweetiebelle who was peering in from the front. "You want to absorb them?" He asked her, he received a 'no' in response. "Alright, your choice." He aimed at the closest one and fired.

It died as it shot out a pus sac and started a chain reaction causing the other to die along with it in a glorious show of light and puss.

Isaac, Applebloom, Scootaloo and even Sweetiebelle who made something similar, all Oooood." At the sight.

Before they went any further, Sweetiebelle stopped them. She pulled them back and looked at them.

"What?" Isaac asked.

She pointed at herself before them.

"Alright you can come with us, just try not to cause an air leak."

She grinned or tried with only an intact top jaw.

"Meet us back inside the cave." Scootaloo said.

She nodded and went off through the hole she came through in, making sure to fill in the gap with rocks.