The monster lay unconscious at their feet and after staring at it for a while Flame Prince lifts up a hand with a flame prepared and asked, "Can we burn him?"
"N-No, he might be useful for finding the sword! Plus…the map was ruined," she held out the drenched guide Gumball gave them.
"But…we knocked him out."
"Then let's wake him up again!" Fi softly pokes the scaly cheek of the creature. It lets out a weak grunt so she begins hitting his cheek repeatedly with the handle of her sword.
"AH! WHAT THE HELL'S WRONG WITH YOU?! THIS IS THE PART WHEN YOU LEAVE!" screeches the monster as he suddenly stands up while holding his bruised cheek. "What d'ya want?!" he shoots a pissed glare at Fionna, then Flame Prince who gave him a fiery stare. He goes back to glaring at Fionna.
Fi wields her sword to emphasize her excitement, instead it made the creature cower but she didn't care. "We're looking for the sword of Bea!"
"Psh, that piece of junk? I could use it as a toothpick," he brags while showing off his large set of sharp teeth.
"HEY! THAT'S NO WAY TO TREAT THE ULTIMATE AWESWOMEST NUMBER ONE ADVENTURER'S SWORD!"
"Even if I knew where it is I wouldn't tell a bratty teenage girl like you, no matter how hot you are," scoffs the creature as he lay back on the ground and shuts his eyes.
He feels a burning sensation on his nose, struggles to get up, but is pinned down by the snout under Flame Prince's boot. The Prince bent down to see eye to eye with the creature, "She asked nicely, but now it's my turn to persuade you…and I'm not a nice guy." Flames burst from his red eyes, "So, talking is not my way of…negotiating." The creature squirms as he can feel the heat from Flame Prince's boot rise, "Wanna talk?"
The creature lets out a muffling approval and Flame Prince lifts up his foot. Fi can see his boot left a black imprint on the snout. "Geez…" he rubs his snout and walks through Fi and Flame Prince to the other side of the cave. He knocks on the rock wall which lets out a hollow side, "If you can break through here it will lead you straight to the sword…." He isn't happy he was threatened by a kid so he isn't willing to break down the wall for them.
Without warning, Flame Prince throws a fireball straight at the wall. The creature jumps out of the way as rocks and soil fly towards his face. "Ooh!" Fi runs ahead, "Thanks monster dude! C'mon Flame Prince it's dark!"
Flame Prince follows in after her after shooting a glance at the pouting creature. The creature watches the couple disappear deeper into the tunnel. "Damn…and I was so hungry too," he turns and is over taken by a dark and evil force. He tries to scream, but he couldn't, he can't see anymore, he isn't control anymore and now…it's not him anymore.
"It's about time I can take down Fionna the human," mutters the Lich in her new body.
…
"Thanks," shyly mutters Fionna when Flame Prince catches up with her. "But did you actually jump in the water?!"
"H-How else would I get to see you again," Flame Prince looks straight ahead with red cheeks. "I was really worried…"
Fi turns from his face to the end of the tunnel where she can see something gleaming under light that trickled from above. "THE SWORD!" she cheered and sprints towards it.
Flame Prince takes one step forward but is caught by something scaly he flips his head around to see what it is yet is pulled into the darkness of the tunnel. Fi's excitement overwhelmed her to check on Flame Prince as she runs down the narrow path leading to the sword. She didn't even look down to see the sword stood on a pillar surrounded by a seemingly endless fall.
With all her might she pulls out the sword and swings it around with giddy laughter. The sword's handle had a skull with a tiny red gem in the middle of the forehead. The blade shone in the tiny light and reflects Fionna's drooling mouth. "Flame Prince, look! I got the-! Flame Prince?" she now notices he is not behind her or anywhere. After strapping the sword onto her back she runs to the tunnel and sees his flame getting dimmer. Immediately, she jogs after the light and is back in the place they defeated the monster. Only he isn't on the ground anymore. "FLAME PRINCE!" she cries out and hears water splashing.
It is dark where the splashing is coming from so she grabs a piece of burning wood from under the cauldron. She growls thinking they should have at least tied up the monster and sprints again. She is huffing from the jogging, sprinting and the panic sweeping over her face. She sweated profusely, especially since she is carrying a big sword on her back. "UNHAND HIM YOU-" she gasps and drops the torch as it shows the monster holding Flame Prince's arms with one hand and using the other to dip his head in the water.
Even though he is aware of Fionna's presence he decides to distress her more and pushes Flame Prince's head deeper in the water. He lifts him up just for her to hear him cough up water and then get shoved back down.
Tears stung her eyes as anger, rage and anguish gives her the strength to move and unstrap the sword. "LET HIM GO!" she screams and slashes the back of the creature. It squeals and let's go of Flame Prince's head. Fi makes another go at the head and cuts at the neck, beheading the creature. She watches the body fall and rushes over to Flame Prince who is doused and coughing out all the water he had to intake. He sits up holding his head and weakly smiles at Fionna.
"Flame Prince," sobs Fi as she wraps her arms around his neck and lays her head on his wet shoulder. She knelt between his legs and moved her head down on his chest to lean on as she cried. Flame Prince bends his head down to feel her hair brush against his nose. He didn't want to summon his flames even though he is in a weak state. He doesn't want this moment of being able to embrace her to end. He kisses her forehead as she wipes the last of her tears away and smiles him.
Then, they turn to the headless body and notice something oozing out of it. A menacing laughter echoed through the cave as the body and head converted into something gooey and black. The Lich reveals herself as her deep, black hollow eyes dug into Fi's. With her skeletal hand she snatches Fionna from Flame Prince causing him to summon his flames back. He prepares to throw a fireball at the Lich, but she is clever and holds Fi up like a shield. He puts his hands down.
"Good boy," says the Lich as Fi squirms around in her grip. "I wasn't expecting to run into you, Fionna the human."
"Small world ain't it?" again she tries to wiggle her arms free to hit the Lich with her sword but is squeezed harder. "C-Can't breathe."
"Fio-"
The Lich interrupts him, "Look at you, you can't attack. If you didn't care about her you would already chase me out of here in less than a minute. Yet, because I have her you are weak. Because you have her you are a coward," Flame Prince wields his flame sword and charges at the Lich. She whips him away with her back hand. He hits the wall hard leaving an imprint and falls on his knees. "Look at you! You are weak because of her! Worry, anguish, and pain your feeling because of her!" she squeezes Fi again who has lost consciousness from being held tightly.
Flame Prince shivers when the air became colder around him. He looks up to see the Lich is face to face with him. He can see her yellow teeth and smell her odor that smelled like a rotting corpse. With her free hand she tilts his head for him to look into her eyes, "I'll show you what kind of future you could have had."
She stretches her bony finger to his forehead and slightly touches it. Images zoomed through his head and showed him burning the village of the goblins down with his mother standing at his side smiling proudly. He can see himself walking through a forest with his feet igniting the grass which led up to the trees. The face had on is the usual one, his mouth straight and his brows furrowed.
The next scene is him walking towards the Candy Kingdom with his own treacherous army following behind him. His mother is at the back proudly smiling as she yells at the troops to get ready to fire. Instead of his usual clothing he has changed into a red military uniform. He sees Gumball riding Lord Monochrome locking eyes with him. Banana guards get ready to shoot their arrows and canons as Flame Prince lifts up his right arm signaling his troops to fire. He and Gumball did not look away as arrows and fireballs flew around them.
The vision ends there and Flame Prince backs away from the Lich heavily breathing and checking his clothing. "That not me."
"It is you, and that is what should have happened!" The Lich puts Fionna on the ground between them. He reaches out to touch her but the Lich continues talk, "Plus, how can you and her ever work out?! You are destruction and she is the one who is supposed to extinguish evil! You two are from different worlds!" Flame Prince bites his lip as he stares at Fionna's face. "Plus, don't you see how much harm you cause to her?!" His eyes widen from the statement and he lowers his head down with his hands covering his face. "So, what do you want? I can make deals that I'm sure will satisfy what you really want."