Death of a Hero

By: DisasterMaster445

Really been wanting to do an multi-chapter Adventure Time fic, but just got around to it. This is gonna be a more adult version of Adventure Time. Not adult like sex or anything, more like violent. This is gonna be what an Adventure Time anime would be like. So, the main characters will be Finn, Jake, Marceline, Bubblegum, and their counterparts from Fiona and Cake, along with an unknown character from Finn's past. Someone from before Finn was abandoned in that forest when Jake's parents found him.

Chapter One: The Last Adventure?

It wasn't supposed to be like this… It was a simple fight with the Ice King, but it didn't end well…not well at all. The blond boy was laying on the ground, iconic hat tore away and leaving his shoulder-length locks wet from the snow of the mountains. His girlfriend, the princess made of flames, stood flickering in the cold air. A circle of melted snow spread from underneath her and hot tears of flame dripped down, throwing up steam.

"Damn it!" She cursed, voice shaky. The yellow dog, the boy's best friend, stretched back up to the peak the girl stood on. He'd been chasing after the one who did this, but came back as soon as he heard the girl's exclamation. He stared down at his best friend, ashamed with how his family's sword was being put to use. The Demon Blood Sword was sticking straight out of Finn's stomach, pinning him to the ice.

"Joshua! Give me my blood!" Jake whirled around, glaring at the muscular Blood Demon. "Come on, man! I need that blood!" "Kee Oth Rama Pancake!" Jake yelled, utilizing the spell his father inadvertently showed him when Finn got the sword. The demon cursed, vanishing.

"This is terrible…" Jake became somber again. "Let's go, FB." He began to walk away, and Flame Princess looked at his retreating back for an instant. Then she looked back. "Jake!" She called. The dog rushed back, quickly seeing the problem. Finn's body was gone!

A few kingdoms over, in a land ruled by Prince Gumball, a blond boy stirred. He was sitting on a couch in his girlfriend's house, said girlfriend with her head on his shoulder. Her cat was curled up in his lap. "Ugh…" He groaned, staring at the flickering lights of the television. "Fiona…" He shifted, causing her to latch onto his arm in her sleep and the cat to twitch. "Damn…Fiona." He said louder. She opened her eyes, looking up at him sleepily.

"What's up?" He looked at the ceiling, troubled. "I've got a bad feeling…"

A Week Later

News about Finn's murder circulated around the kingdoms, and hundreds of people were meant to be at his funeral. That was how the blond boy found out. As soon as he read that article, he was sure. This was the boy he'd been looking for, and yet he was dead. He knew the kingdom, or course. Gumball's cousin, Princess Bubblegum, ruled that kingdom, so he knew it would be no problem getting hold of them.

"Fiona, we need to get to the castle." The blond girl looked confused. "Why?" "I've gotta see Gumball." Fiona shrugged and grabbed her hat. Oddly enough, it was his old hat, and was identical to the hat Finn wore. "Come on, Cake."

At the castle, Gumball and Marshall were in the throne room, arguing. "Dude!" The vampiric rock star exclaimed. "Just call Bubblegum! We've gotta know if this 'Finn' kid is the guy he's been looking for!" "I understand that." The Prince said calmly. "But I don't want to bother her with this. She's going through enough right now. From what I understand, she really cared about him."

"That's the point! Wouldn't she like to know if this kid had family?!" "Oh, come now." Gumball said. "No, seriously! He's a human, this kid's a human, that can't be a coincidence!" The Prince laughed. "That means nothing. Fiona is human. She's not related to him."

"Guys." Both boys turned. "H-hey, man." Marshall stuttered. "How long have you been there?" Gumball asked nervously. "Long enough. Listen, I know this 'Finn' is the one I've been looking for. I've gotta get to the Candy Kingdom." The pink boy looked exasperated.

"How can you possibly know?" "You just have to trust me. I have a feeling." The boy looked emotional, something neither of his best friends could associate with the warrior. Fiona stepped up next to her boyfriend, grabbing his hand in a show of support.

"Gumball, we really need to make the trip." She said quietly. Gumball looked at the two of them for a second, and at Cake the cat behind them, and nodded. "Normally I wouldn't allow such a thing, but you're my best friend…" He stroked his chin thoughtfully.

"Do you have your staff?" The boy nodded. "I always have my staff." Gumball stomped the floor twice. "Lord Monochromicorn!" He beckoned. A swirl of shadows appeared on the ground, and a black unicorn stepped up out of it. His mane was grey, and as he came from the shadows, his body just kept coming, seeming to stretch. Finally, he exited the hole.

"Hey, gorgeous!" Cake shouted. Monochromicorn clacked his hooves against the ground in Morse code, whinnying. Thunder crashed. "Hey!" "Mo-Chro," Gumball interrupted. "I need you to take these three to see Bubblegum." He nodded, snorting. "Four." Marshall interjected. He turned to Gumball.

"I can't leave my friend in the lurch like this." He declared, flashing an all fangs smile. Gumball nodded. "Fine. Go."

Princess Bubblegum and Marceline were in the princess' throne room, mirroring their relatives only hours before. Both were grieving in their own special ways. Bubblegum was bawling her eyes out, and Marceline was morosely strumming her Axe-Bass.

"Come on, Bubblegum." Marceline tried to soothe. "Maybe it's not what we think. They didn't find the… body." She whispered the last word, but PB began crying in earnest. Jake, who was acting as PB's bodyguard in light of recent events, rushed into the room.

"Princess! Marceline! There's some suspicious guys outside!" However, another pool of shadows formed, Mo-Chro bursting forth with his passengers. "What is the meaning of this?!" Bubblegum shouted, tears forgotten for the moment. The blond boy slid down from Mo-Chro, face green and sickly. Whatever PB and Marceline were going to say was lost as they saw the resemblance. But Jake leapt into action. He stretched out, barreling the boy over.

"Who the hell are you?! And why do you look like Finn?!" He bared his fangs, aimed at the boy's neck. "Wait!" Marceline cried. Jake flicked his eyes to the Vampire Queen, who was embracing another of the intruders.

"Calm down, sis. Jeez. It's not the time." Marshall muttered. Jake was surprised, but kept focused on the boy. "Answer me!" The boy glared hatefully at the dog. "I'm Jinn, of the Humans! And Finn was my brother!"

So, that's that. This mysterious blond boy is Jinn, Finn's brother, and one of the last humans in Ooo. He's heard about Finn in the news, and has been searching for his baby brother for a long time. Ever since he got a vision that his brother might be alive. He's formed a team of his girlfriend, Fiona, her cat, Cake, his best friend, Marshall, who is Marceline's little brother, and Lord Monochromicorn, Cake's boyfriend and Gumball's trusty steed. This team is in Ooo to find out what happened to Finn the Human, and to gain revenge for Jinn's long lost brother. Who killed him? Finn was fighting with the Ice King, but is he the culprit? He's said he never wanted to kill Finn, but did something change his mind? Or is something more sinister at work here? Follow me to find out. Ja Nae.