For those of you who read this, thank you so much! I'm glad you're enjoying it so far.

For the first time, I don't have much to say... wow.

So, last time, Marshall Lee was beginning to tell Fionna, Cake, and Gumball about the Mushroom War, since Fionna was bothered by many nightmares about the extinction of humans. Again, this is my idea of what happened and several things I've seen on the Adventure Time Wiki site about the war (which mostly inspired my idea).

I'm still taking headcannon and song submission. I will always give credit.

Disclaimer: I do not own Adventure Time With Fionna and Cake.

"Simone would tell me about what happened before the war, when she was with her fiance, when the war started. And she said the the world was beautiful when it was peaceful and full of intelligent people," Marshall went on, smiling softly as his childhood with Ice Queen appeared right before his eyes. "She told me that the world was just a downright amazing place years before everything changed. Before she changed..."

The city was full of tall buildings, the streets towered by the concrete jungle. Cars passed by one another in sluggish traffic, horns being honked at one another so they could return home to their families or get to work on time. Construction workers building more and more skyscrapers that reached new heights for all to see. Planes would fly overhead to new locations, bikes were ridden down paths, people hiked on large mountains that were carved for their convenience, and people would pass by one another with either a simple hello or exchange a smile to brighten someone else's day. A young Simone Petrikov was walking through the pushing, grumbling crowds on her way home to her fiance, Bertram, and show him the recent item she collected from her trip to Greece. She looked up at the clear, blue sky through her circular glasses with a chaste smile, enjoying the world around her in spite of the lazy, bothered citizens. She turned her head a little more to watch a plane zoom by, making dark hair dangling down her shoulders. Simone brushed away the locks and continued her stroll home. She reached her apartment building and climbed up several stairs before she reached her complex. She unlocked the amber door and entered, smiling at Bertram, who was sitting on the couch with a book in his hand.

He looked up and returned a smile in her direction, his crystal glasses flashing in the light hanging above him.

"Good afternoon, my prince," Simone said, sitting beside him and kissing his cheek.

"Welcome home, Simone," he replied. "What do you have there?" He nodded to an old, battered book that was poking out of her bag.

"Oh, this is something I collected during my trip," she said, puling it out and showing it to him. "It's called The Enchiridion. It's an ancient book that I'm going to present to the museum later this week." She opened it and turned the pages delicately. "It's nice, huh?"

"I suppose it is. It's very nice," he agreed. He watched her with an amused expression as her warm eyes scanned the yellowing paper carefully, wonder dancing in her orbs. Bertram started to chuckle and she glanced at him from over her glasses.

"What's so funny?" she demanded.

Bertram encircled his arms around her shoulders. "You are. You and your fascination with things like this. I love watching your face as you come across new things. There's never a dull moment."

Simone closed The Enchiridion and put it on the coffee table before hugging him for a few seconds, letting another smile grace her lips. She stood and patted his cheek affectionately. "I'm going to make us some tea. What kind would you like?"

"Ginger, if you don't mind," he said.

"As you wish, my prince," she replied.

Days like this were not unusual to Simone. She and Bertram were happy with one another, always supporting each other in everything they did. And the world around them was like that for a while. Until the government that was in power over Simone's country decided that their neighboring countries were trying to better them in everything. From technology to agriculture, everyone was beginning to feel stabbed in the back. And one day, the horror for Simone began.

Bertram and Simone were home one afternoon, the sky outside was, once again, clear blue. Bertram was shaking his head at an article about the declaration of war against one of the many countries that surrounded their own. Across the room, Simone was watering some strange plants that were carefully potted in the corner of the complex. Her fiance ruffled the paper and his eyes found something that peeked his fascination.

"Simone, I found something that you might be interested in," he said, making her turn her eyes up to look at him. He beckoned her over and she put down the watering can, making her way over to her fiance. Bertram handed her the paper and she took it from him. He pointed at the ad he noticed and said, "It's an old dock worker from Northern Scandinavia who found a bunch of ancient artifacts that he's looking to sell. I thought about how you might want to check it out before he sells everything to someone else."

Simone's eyes brightened and she hugged him around his neck, grinning ecstatically. "Thank you, Bertram! I'll go and get something for you too," she promised. "This is going to be so exciting." She jumped up off the couch and grabbed her wallet. "I'll be right back. I want to get there before everything is gone."

Bertram laughed at her excitement and bid her goodbye as she left the apartment, ready to buy something that would change her life forever.

Her drive down to the dock was a slow one, since traffic wasn't unexpected in these parts of the city. But finally, she reached the docks and got out of her car, following the boats until she found the one that had a large sign on it that said "SALE". The worker was tall and built, an eyepatch slung over one eye and the other one was grey and cold. He was watching everyone who was looking through his found items with a scowl that made his rough and stubble-covered face upturn slightly. His dark hair was hidden beneath a captains cap and one of his hands was missing, only a stub showing out from his large overcoat.

Simone hesitantly made her way over to him and felt a sudden chill as he turned his large head to look at her. In a thick Scandinavian accent, he welcomed her. She nodded politely and joined the rest of the patrons in the search of the boxes. She dug through several, finding nothing that fascinated her. Simone was close to giving up and going home until a little sparkle caught her eye in the bottom of a box. She picked it up and found she was touching a cold, hard metal. It was gold, no doubt about it. Simone removed it from its box and felt a cool wind blow by her, the salty sea air moving her dark hair into her eyes. As she brushed it away, she took a good look at whatever she found.

It was a tiara. It was gold alright, with rubies encrusted in the sides, giving it that sparkle that caught her eyes. She lifted it, holding it up to the sun but frowned, finding that the sun had disappeared behind dark, menacing clouds. The dock worker trudged up to her and tore the tiara from her grip.

"You don' wan' tha," he growled.

"I think I do," Simone said, raising her eyebrows at him. "It's an interesting artifact."

"Dangerous," he said. "Crazy."

"I think I'll take my chances," Simone said, grabbing it back from him. "I specialize in things like this. Please, I would like to take it. I'll pay double the amount it's worth it that will pacify you."

The worker glared at her with his good eye, his eyebrows furrowing with concentration. He shrugged heavily and accepted the money from Simone.

"Thank you very much," she said before returning to her car.

She was excited. She and Bertram were going to have such a good laugh at how silly she would look in that tiara. How she would say, "I'm your princess now. I guess that would make us a king and queen, huh?" Then they would laugh together again, like they always do.

The clouds hanging above Simone still didn't go away. It was odd, she thought, how the sun was shining overhead an hour ago but now... it was as if these clouds came out of nowhere, which they did. But no matter, this place has funky weather anyway. One day it would be cloudy and rainy and the next it would be sunny and hot. You could never win the war with weather in these parts.

Simone parked the car out front and walked quickly up the stairs to her apartment. She pulled open the door and found Bertram sitting at the kitchen table, writing a few things down in some of the files he kept. He looked up and smiled at Simone as she made her way over to him.

"Look what I found!" she said joyfully.

Bertram adjusted his glasses and looked at the tiara. He chuckled and waved his hand towards her head. "Put it on," he said. "You'll look even more like a queen."

She blushed at him with a playful roll of her eyes and put on the tiara. He started to laugh and say something in approval but Simone didn't hear him. The room became dark and she saw visions of battle, people screaming and shouting at one another, the world coming to a close. She shouted at them to get out and watched everyone die, one by one. Simone screamed and then she realized it was the tiara. Somewhere in the back of her mind told her to take it off. So she did, ripping the tiara off of her head, breathing hard. She looked up at Bertram, who was staring at her fearfully, his eyes wide and full of horror. His hands were red, showing that Simone had squeezed them hard by accident. She looked at the clock hanging on the wall and saw that she had been trapped in the tiara's visions for about thirty minutes when it only felt like seconds to her. Simone turned her eyes back on him and took in fully how frightened he was by the sight of her.

"Bertram?" she said, trying to approach him but he backed off. "What's wrong?"

He just shook his head and continued to back away from her, his body shaking with fear. He gulped as he glanced at the tiara and rushed away into their bedroom. She whipped around and walked after him, trying to get him to tell her what was wrong.

"What-?" she began but he was packing hastily.

"Just stay away from me, Simone," he said harshly, still shaking violently.

"What... what happened?" she croaked, her eyes misting over.

"I said away!" he said, slamming the suitcase shut and sidling against the wall to keep his distance from her.

"Whatever I did- I'm sorry!" she pleaded, following him out of the room. "Look, I'll put it back on," she said, not really remembering what she had seen before. "We'll laugh again and everything will be back to normal."

"No, don't!" Bertram cried but, in a desperate attempt to make everything okay, Simone planted the crown on her head and found herself being swallowed by darkness. Again, there were more visions of war. People screaming and dying everywhere around her. One of those men was Bertram, who was running away from a large bomb. She yelled at him to get away from it, unable to move and save him herself but then, like last time, she realized it was just the tiara. She was able to take it off but he was looking at her with such contempt.

"I... I," she said, feeling hurt by his stare. "I'm sorry."

He shook his head rapidly. "What you said was terrible. I'll send for my things. Goodbye." In his voice, was pure sorriness and depression. He obviously didn't want to go but what Simone said scared him. What was she trying to pull? This wasn't funny!

"Bertram, please!" Simone begged, watching him slam the front door shut. She sank to the floor and wept into her hands. "God, what did I say?" She noticed the tiara by her side and grew angry. "What did I say?!" she roared, standing and kicking the crown across the room, a sudden anger filling her that had never been there before. She was usually a passive, sensitive person but now, all she felt was cold, hard anger.

And for years, this continued. She would put on the tiara in hopes that she would be able to amuse herself but found nothing but a harsh chill scramble down her spine and her hands begin to freeze the air around her.

"She said that it was hard to remember after that," Marshall said. "But the war... it had begun around the time she put on the crown."

"Well that's what we came to hear," Cake said.

"Relax, I'll tell you. She was alive years before me and when she met me, it was hard to tell a five year old demon child the truth about the war," Marshall said harshly, glaring at the feline. "Simone didn't want to scare me." He cleared his throat and drank the red from an apple and went on. "So... Simone's skin began to turn cold and blue. And the war was raging on..."

Simone looked outside after recording her newest video and found the air was red and smokey from the raging war. Her apartment building was surprisingly still standing. The others were not so lucky. They were sinking to the ground as if they were in quicksand, toppling over one another like a dominos game gone wrong, and the many sounds of shouts, combat boots hitting the pavement, and guns being shot filled the air. She was able to keep up with what was going on through tattered newspapers, the local daytime news, and just looking outside in general. The tiara was right: this war was going to end the world. It showed no signs of stopping and the first bomb was dropped not too long ago in a place called Germany. Everyone was now rushing to create bombs and it was now a competition to see who would get "nuked" next. It was disgusting how humans were, Simone thought acidly. Then she heard herself thinking this and shook her head angrily at herself, glaring at the tiara. It was calling to her, whispering how it could save her with the powers of ice and snow. It kept calling her the Ice Queen and how it would obey her every command. And Simone was being pulled in, wanting more and more power from the crown. It was hard to fight it off but her sanity was slipping away.

In the world around her, more and more countries were vanishing, bombs being dropped by everyone. Screams of terror were heard one day and Simone looked up from her hands, in which she was crying. She turned off the camera and rushed over to the window. A giant bomb was soaring towards the ground a few miles away. She would be vaporized if she stayed here any longer. Grabbing her things wildly, she stumbled around the house, ignoring the hissing of the tiara on her head, telling her that she would be fine since the power she held in her hand was able to save her. Simone grabbed everything she could, including her video tapes and camera, and ran out the door, the bomb colliding with the earth a few miles behind her. The momentum sent her flying and she blasted an ice shield behind her, protecting her from mutation or, worse, death. She fell to the crumbled streets and watched, horrified, as bodies of humans flew away from the blast, eyes wide open, their skin charred and burned.

Simone adjusted her cracked glasses and blew her, now white, bangs out of her face. With a gulp, she stood, shaking violently, and made her way out of the city, knowing that this wasn't the first or last time it was going to be bombed. The snow covered ground, no doubt caused by her own doing, crunched beneath her feet as she walked alone to a future that held an uncertain fate.

A few more years passed and the war was still cursing the world. Bombs were being dropped every which way and Simone would sometimes see mushroom clouds in the distance. Sometimes a putrid green or a ghastly orange. Around her, the buildings had fallen and the streets had evaporated to give off the appearance she was in a desert wasteland. She kept on walking until she reached a destroyed city, the buildings overlapping one another, falling down and turning into rubble. Several cars were crashed into houses, the street was cracked and faded, and stores were windowless, their products spilling out of the building. Simone's tiara was on a loop chain hanging on her belt and her hair was incredibly long and white. As she moved along the empty street, the city smoking with residue from battle, she heard someone crying. A child...

"Me," Marshall whispered. "I had been abandoned by my mother at the time, my father had died at war. My demon half prevented me from dying. I can still remember the day I was lost. The battle, followed by the bomb..."

A tall, raven haired man was running through the streets, his son in his arms. His feet were heavy as they ran past people who were trying to avoid battle. Little Marshall Lee looked up into his father's face that was uncharacteristically pale and cold, stricken with fear for his son's life. Marshall's tiny fist was curled around his father's shirt an found himself being put down into a metal bunker. The man let go of Marshall and looked around frantically, the whistle of the bomb getting louder and louder. Marshall would be safe here, he concluded.

"Now, Marshy," he said gently to the boy, kneeling down and ruffling his son's hair. "I'm going to be right back. Mommy and I will come and get you as soon as this it over." Marshall didn't catch the empty words. His father knew he wasn't going to come back. And neither was Heather. "You're gonna grow up big and strong, okay?" The man flashed his hidden fangs with a sad smile at Marshall before kissing him on the forehead. "I love you, son. Never forget that."

"Daddy?" Marshall said, his eyes filling up with tears. "Don't go." But his father unlatched Marshall's grip on his shirt and ran off, the bomb getting ever closer. "Daddy!" he cried after him.

But he stood and watched from afar as the bomb collided with the ground, an explosion of epic proportions making everything in its path blow up. Chunks of buildings flew by, bodies were torn apart or simply vanished on sight, and screams of those in pain echoed all around the building which kept Marshall Lee safe.

After a while, the radiation went down and all was silent. No one was around anymore. Marshall heaved himself out of the bunker and waddled around, looking for his parents.

He began to cry, little tears flowing down his tiny face, staining his overalls. He was all alone.

"Mommy," he sniffed.

The sudden jingle of chains made him look up to see a blue skinned woman with snow white hair. Her eyes were cold but he could tell she was genuinely a warm person. Simone knelt beside him and wiped his tears away gently. She then made her way over to a broken toy store and picked out a dark pink teddy bear. Simone handed it to Marshall and he smiled with glee hugging it and looking up at her with red eyes. Simone knew that she had to take care of this boy. There wasn't anyone else around to care for him. She picked him up and he clung to her, relieved that someone was holding him again.

Silently, Simone walked away from the war ridden city, Marshall Lee in her arms. Planes flew by over head and Marshall buried his little head into her neck in fear.

"It's going to be okay," she promised him, stroking his raven hair. "They won't hurt you with me around."

On that night, Marshall Lee and Simone Petrikov were partners to survive the apocalypse of the human race. The only known survivors to the war and they were the ones who would watch the world fall. Together, they would journey and experience everything together. But Simone knew that the tiara was going to interfere with her relationship with Marshall and how she was able to save him.

"Who is going to save me..." Marshall said under his breath. "So anyway, when I was about twelve-"

"You're stopping there?" Fionna said. His eyes skidded over to her and she covered her mouth with her hands.

"What do you mean?" he said softly.

"What about your time with her?" Fionna explained, removing her hand.

"I really don't want to talk about it," he said. "She left around the time I turned thirteen, which was about ten years for her. I age slowly, you know that."

"So we're not gonna hear about your life with her?" Gumball said.

"I don't want to talk about it," Marshall spat, his cheeks flaring up with anger and his eyes flashing dangerously. "My Mom found me a year or so after she left. And I was in Simone's care when the bomb was dropped."

"Which bomb?" Cake asked.

"The Mushroom Bomb. The one that ended the war permanently," he said. "So, as I was saying: when I was twelve, I saw it..."

Simone and Marshall Lee were walking along a dirt path, the world nothing but a large landmass by now. Even though there was nothing left, war still raged between two groups that were still trying to out do each other. Marshall was looking over the cliff they walked on, where the dirt path was carved. Ahead of him, Simone was frantically scribbling something down in her journal, humming to herself. She was writing on the back of a photo of Marshall Lee, not realizing what she was writing was going to return to her years later.

"Simone?" Marshall said.

"Yes?" Simone replied, still writing.

"Are we there yet?"

She smiled and paused her pen over the picture, looking at him from over her shoulder. He was clutching Hamba in his arms and looking up at her with those same red eyes. His fangs were protruding out of his mouth and his red T-shirt had flecks of grey on the collar, showing his had drank the color from it.

"Almost," she said. "It's going to happen soon..." she mumbled under her breath looking up at the sky frantically.

"What's gonna happen?" he asked her.

"Nothing, Marshall. Just keep walking," Simone said distractedly, finishing her note and closing her journal. "We're close now."

Marshall turned his eyes to look up at the sky to see if he could see what she was talking about. What was going to happen soon? Was the war going to end? Were the dark clouds going to finally show blue skies and the hills be covered in long, green grass like he had heard about from Simone. Another hour of walking made Marshall Lee grow bored. He had taken to blowing his hair out of his eyes every time it fell to keep himself entertained. Simone would sometimes open her journal an jot down a few words before closing it again, biting her tongue and looking up at the sky. She had to get the two of them into the bunker she made a while ago so they could hide from what was to come. So they could survive. She had to save Marshall Lee from certain death. He was too young to die.

Finally, Simone reached the bunker and opened the large metal door that she had stuck inside the mouth of a cave. The walls were covered in old paintings she had salvaged from her old home, an ice chest with food (many red for Marshall) and many bottles of water. Two mattresses were lying on the floor covered in hastily sewn together blankets and pillows. She and Marshall climbed in and she shut the door behind them.

"What's going on, Simone?" Marshall asked, sitting on one of the makeshift beds.

"The end of the world," she said. "But we'll be okay. The tiara will protect us."

"Protect you," Marshall said under his breath. Simone heard him but didn't scold him for it. He wasn't to blame for his resentment towards the headwear. He played with Hamba for a minute before he looked up at her. "Can we watch it?"

"Watch what?" Simone said, opening her journal and writing something down.

"The end," Marshall said quietly.

She glanced at him from over her chipped glasses. "Why would you want to watch that?"

He shrugged apologetically. "I don't want to act like it didn't happen. You always say to face whatever life has to offer... so I want to watch what will happen."

This surprised Simone. Marshall was never one that would be fascinated with such things. But he was giving her a pleading look and that was when it hit her: he wanted to see that it was real. He wanted to understand that this war was a reality and that adults couldn't hide it from him any longer. So she nodded slowly, knowing that it was going to happen in a few seconds.

"But as soon as it's over, we're going right back inside," she said. "Understand?"

He sat up, nodding rapidly. Simone pulled open the door and they stood in the doorway, watching the waste land and listening to the distant shooting of guns miles and miles away from them. The city scape was barely seen and soon, a whistle was heard from beyond. Simone felt Marshall take her hand and she gently squeezed it to show she wasn't going anywhere. They watched as the Mushroom Bomb slammed into the ground a long way away, a humungous mushroom cloud billowing in the air and the radiation zooming fast, a gigantic crater sinking into the ground, filling to the brim with toxic waste. Simone slammed the door shut and the radiation passed harmlessly by their bunker.

"We're going to have to stay in here for a while," she said to Marshall.

"How long?" Marshall asked fearfully.

"Just until the radiation goes down," Simone explained. "We'll be okay."

Across the wasteland, in the pool of toxic waste, emerged a female ambassador who started this whole thing. Her head turning skull like and her eyes a hallow black with green dots. Two horns protruded out of her head and a long dark cloak was now wrapped around her body. The Lich Queen looked around her, a sudden want to kill everyone around her. And on the other side of the pool, another woman pulled herself out. She was incredibly tall and had long, orange hair and pale blue skin and six fingers. This was the enemy ambassador to the Lich Queen's land. Becky the Hero looked over at the Lich and they exchanged a silent vow that this war was not over.

And all across the world, the radiation spread, mutating people into strange creatures and eventually killing thousands, who couldn't take the mutations. Years and years went by and the number of humans dwindled, either killed by the Lich or being mutated depending on what they were doing the time the radiation hit. Soon, Simone, who no longer went by that name, vanished from Marshall Lee's life. He walked alone for a while until he was collected by his mother, who brought him home to the Nightosphere to live for a while until the radiation levels were completely extinguished. He spent years with his mother until she ate his fries, provoking him to run away to the new, mutated world that was slowly becoming Aaa.

The Lich Queen and Becky had several epic battles, making the very ground shake beneath their feet. A huge rumble would ripple across the land and everyone would know that the two were still battling out the war they held in their hearts.

In sorrow for leaving Marshall Lee, but not aware of why she was so sad since she couldn't exactly remember, the Ice Queen shrouded a mountainous land with ice and snow, making it her domain to live in solitude. And she cried about losing a prince, losing a dear friend, and losing a life she once had. The tiara had her in its grasp.

And that is the end of the very long chapter. I guess I could have gone for two parts but I just kept going and going. I hope you guys like it.

Keep on reading and reviewing. It's appreciated! And thanks for all of the reviews so far. It really means a lot to every writer out on this sight.

See you next chapter!