Finn entered the castle. The servants were watering plants, and there were two guards at the entrance to some room.
"I'm looking for Water Princess," he told them. They nodded and stepped aside.
Inside the Caverns, the Keeper sat at his throne, as King of the Caves. A small insect-like creature came forth and landed on the Keeper's finger. It was a small bot of some kind. A container on it's back was filled with red liquid.
"Excellent! Finn's blood!" he shouted with in delight. "Now, all I need is some of that radioactive material. It is almost time now."
He quickly mixed Finn's blood into a vat. He took a syringe that was filled with his own blood, mixing it into the vat as well.
"Now, all the DNA is mixed. My creation is nearly finished. But, I'll need to stall them."
Finn and Water Princess headed towards the Candy Kingdom. She had been aware of the situation already, but had not left by the time Finn had arrived.
When they reached the kingdom, they were shocked to find Scorcher yet again attacking the city.
"Wha-?"
Jake and the Ice King were using their ice ninja leaped into action, using his sword to attack Scorcher's monster.
Meanwhile, the nuclear bomb headed their way. Finn climbed onto the monster and kicked Scorcher off. He battled Scorcher while Jake fought the beast.
"Who sent you?" Finn asked Scorcher, who only burned Finn. Just as Scorcher gained the upper hand, the Ice King zapped him with ice magic. Scorcher yelled in pain, and just then, a massive boom echoed in the distance.
A small crater, filled with mutagenic ooze formed at the area of impact. The bomb was not as powerful as the one that had come 1,000 years prior, and had left only a small scar on the Earth.
"Excellent," said the Keeper as he waited by the bomb. He took a sample of the ooze. He raced back to his hideout and informed Scorcher via magic that his job was done. Finn and Jake were surprised to see Scorcher fleeing the scene.
"Now then," the Keeper said. "It is complete."
Out of the vat came a small creature who rapidly grew in size. It became an enormous creature with a rocky body and clear crystals on its body. It stood on all fours and roared loudly. It resembled a turtle without a shell.
"Yes," the Keeper said. "A creature who possesses all the powers of the most important people in all of Ooo."
The creature headed right for the Candy Kingdom. Finn and Jake could hardly believe their eyes.
The creature stopped in front of the kingdom, the clear crystals glowing bright red. It breathed fire across the kingdom, melting the candy buildings as the princesses and citizens ran from the kingdom.
The monster headed for another, the Fire Kingdom. The crystals on the monster turned a deep blue, and it began to spit out water. It attacked the kingdom while Finn chased after it. He was stuck by a falling piece of debris. The last thing he saw was the Fire Kingdom losing its namesake, as well as steam.
"Are you okay, bro?"
That was the first thing Finn heard as he stirred awake. He looked about, half-asleep, and jerked awake as he saw the steam emanating from the pile of rocks that was once the Fire Kingdom.
"No!" he yelled. "The Fire Kingdom, it's destroyed! I'll kill that monster!"
Finn looked back at Jake and his friends. There stood the Ice King, Marceline, Water Princess and Flame Princess. Everyone of them looked upset (save for Marceline, who only looked angry). He took a closer look at Flame Princess. He expected her to be angry or sad, but her only emotion, it seemed was defeat. He had had enough. He dragged himself up.
"C'mon," he said. He picked up his sword and backpack off the ground. His white hat and clothes had torn slightly. He gripped his sword tightly, ready for his revenge. What had just transpired was unforgivable.
Not one, but two kingdoms had just been destroyed, and there were many more in danger. They noted that the Slime Kingdom was next (as the monster was headed n that direction), and they turned back to the melted Candy Kingdom, where the princesses were standing.
Princess Bubblegum was in front of everyone, staring at her once giant tower, with nearly all of it gone. All the citizens had evacuated, and only Stormo and Goliad remained.
"What was that thing?" asked one of the princesses.
"Whatever it is, I'll make sure it's defeated," Finn responded. "Hero's honor."
He chased after it. Jake, Marceline, and Ice King went with him. They arrived at the Slime Kingdom, now being dried out and hardened by air that the monster was spitting out, now with cloudy, white crystals. Finn ran up to the monster and jabbed his sword at it's back. The sword barely pierced it's rock-like body.
Then, Finn found himself being thrown back, and out of the shadows appeared the Keeper.
"Well now, what do we have here?"
The Keeper pulled out a sword. He struck at Finn, but Finn parried it. Finn tried swinging his sword at the Keeper, knowing full well he was behind everything. He missed and ended up getting sliced on the cheek. So the sword fight began. For a long time, they did not damage each other, until finally the Keeper cut Finn's eye. Now half-blind and lacking some depth perception, Finn missed swing after swing.
Finn kept on trying to hit the Keeper, while the latter simply dodged.
"Fool," the Keeper said. "Do you want to die?"
With that, he struck Finn, who was barely able to block it with his own sword. It was then Finn really took a look the Keeper's sword. It was dark grey, almost black, and it had what appeared to be some sort skull attached to the bottom. The skull had red jewel eyes, and the hilt and handle were silver.
As they struggled with the clash, Finn's sword, one of his most precious, treasured objects, had cracked and shattered.
Finn was paralyzed. He had no time for anger though, as he felt a very sharp pain in his arm, and looked down to find that it was cut off. As the Keeper fled, Finn fainted from exhaustion and his injuries.
As his friends were busy fighting off the monster, a small ship came by and abducted Finn.
Finn woke up in a white room, a shadowy figure looming in front of him.
"Hello there, Finn the Human."
