Hi everybody! Sorry for the long wait if you just got this chapter. (but if you're a reader from the future, totally ignore this sentence).
Anyways, this is a pretty long chapter, featuring small Dipifica moments. Yay...

This chapter features the Reverse Pines/Reverse Falls AU, created by yapypas on Tumblr! (Meaning I didn't create this AU)
This prompt idea came from amazing reader Aqua Girl 007, where she requested Reverse! Dipper and Pacifica to interact with something supernatural. Thank you again so much for the idea!

If you are not familiar with the Reverse Pines/Reverse Falls AU, I suggest you check it out first! (seriously, just google Reverse Falls or Reverse Pines AU, then you should probably get a good idea on what's going on). :D

Okay, continue reading, Dipifica lovers!

"Okay, a woman on fire. Seriously, DipDop?!"

"Pacifica, it's called the Mulier Ardens."

"I don't care for it's weird, gibberish name! Dipper, we have to get out of here!"

"I refuse. I plan on finding the Mulier Ardens and steal it's artifact, and for the record, Mulier Ardens is latin for 'burning woman'."

Dipper and Pacifica, the sociopath and dark but mannered brunette and the sparkly, hyperactive blonde of Gravity Falls were stuck in a dark cave, but Dipper's mystic azure amulet gave light. Pacifica also pulled out her phone from her leather purse and turned on the flashlight, as both read the dangerous warnings of the 'Mulier Ardens' in Dipper's new journal.

So far, the supernatural creature they were about to face seemed deadly.

"The Mulier Ardens possesses a flaming heart that is worth millions when extracted to a cool and solid substance. Apparently, when the fire is removed and cooled down, the heart turns into a piece of pure gold that can capture over a million souls and spirits within it's grasp. However, obtaining the heart is not easy. The Mulier Ardens has said to have a flaming and combustive body that can burn anything in it's path. No water nor the coldest ice can kill the monster. Many have tried to obtain it's rare artifact, but none have succeeded. All of the hunters were burned to death, no sight of their corpses to be properly buried. If you ever get into the Mulier Ardens' Cavern, RUN WHEN THE CAVERN'S DOOR IS STILL OPEN."

After reading the page, Pacifica slammed her back on the walls of the cave and moaned. "Great! We're gonna get roasted like a bunch of marshmallows!" she complained. "Dipper, do you even know how to at least get this thing distracted?"

"Of course, Pacifica. Do not doubt my abilities. I have it all planned." Dipper said, grinning confidentially and putting his journal away in his cape. "When the Mulier Ardens enters, just hide behind me and don't make contact with her."

Pacifica felt petrified and skeptical, but she nodded. She hoped the both of them can at least make it out of this death chamber alive, even if they had a million cuts, bruises and burns on their bodies.

From the depths of the walls, the pair heard mischievous chuckles and laughter echoing the walls of the cavern. A feminine and croaky voice then started to sneer.

"Stupid, idiotic children... you think you can kill something that will burn for eternity?" a voice tormented outside the walls. "You're going to end up like all the other adults who tried to mess with me."

Dipper held onto his amulet as the voice's laughter started to get louder, gripping on it tightly and summoning a bit of it's power. His eyes started to glow an azure color, and Pacifica slid behind him for protection.

Fire suddenly blazed into the dark chamber out of the blue and it also conveniently lit all the empty torch lights hanging upon the walls. From there, the main source of the fire started to swell up and form a body- the body of a woman with long hair and a long gown. A face grew onto the body, and the same laughter that echoed throughout the rock walls was transferred into the flaming female.

Dipper and Pacifica watched with terror as the Mulier Ardens started to travel around the room, tormenting them and pretending that she was intimidating.

"I am right! Just a bunch of little children!" the Mulier Ardens snickered, as she stood in the middle of the cavern where she originally was.

Pacifica huffed and gripped onto Dipper's shoulders. She despised the tone of the fire spirit. "We're both seventeen," she muttered under her breath. "And how old are you? Like, 1000 years old?"

"No, you pathetic child, I am as old as the discovery of fire." the Mulier Ardens mocked, crossing her supposed arms across her chest. "Get your facts right, at least."

Dipper cocked his head a bit so he could look at Pacifica, a bit annoyed at her. "Don't encourage her or yourself, Pacifica." Dipper warned. "It's best if you just leave her to me."

Pacifica looked to the side, embarrassed and frustrated that she couldn't do anything (nor make a come-back at the Mulier Ardens anymore), but she smiled confidentially at the brunette. "I hope you destroy her, Dipper." Pacifica smiled. She nuzzled Dipper's cheek while she was at it, making him blush.

He chuckled a bit, returning her little gesture back. "I will." he replied. "But you have to listen to me whenever I tell you to flee, okay?"

Pacifica nodded, and backed a bit more from Dipper and the fire woman.

The Mulier Ardens continued to laugh, even flicking off a fire tear she developed from her supposed eyes. "It's sweet to watch useless human interactions," the spirit giggled. "It's such a shame that she's going to burn first."

"Not unless you get pass me." Dipper said, as his amulet started to glow intensely. "One burn you give her, and you'll die instantly."

The Mulier Ardens gave a mocking smile at Dipper, intrigued with his calm and collected personality. "Is that a challenge?" she asked, actually a bit curious. "Are you that confident that you will defeat me?"

"I already know I will."

Dipper suddenly charged toward the Mulier Ardens, releasing his grip on his amulet and jumping straight at her. The Mulier Ardens switched to a fighting stance, conjuring up a bright neon red fireball on her finger tips. Dipper's amulet was charged enough for an azure beam of light to exit out of it, as the beam instantly passed through the Mulier Ardens' supposed forehead. The light was strong enough for a hole to develop, and smoke started to come out of the wound and fog up the entire chamber.

Dipper eventually landed back on the floor, backing up so he could catch up with Pacifica for a few seconds. The blonde started to cough as the smoke started to build up in the room.

"Are you okay?" Dipper asked, turning around to make sure for himself.

Pacifica covered her mouth and nose with the long sleeves of her sweater, and closed her eyes as tight as she can. "I'm... fine..." she coughed. "Just go fight that stupid fire lady!"

Dipper watched his friend slowly wither from the smoke, the blonde even collapsing to the floor slowly. Her leather purse fell beside her as well, making a loud and echoing crash sound.

"Where... where are you, child?" Dipper heard the Mulier Ardens moan angrily. The smoke started to fade away and Pacifica recovered for a few seconds, standing back up and behind Dipper. She still closed her eyes and coughed every now and then.

As the smoke started to go away, Dipper saw the Mulier Ardens back where it originally started, a hole still on her forehead.

But the next thing that happened surprised Dipper and Pacifica, shocking them to the bone.

The Mulier Ardens' forehead started to reform and re-generate, covering the hole with it's fire and healing the wound. As soon as the hole was removed from existence, the Mulier Ardens returned back to it's original form and stance, staring down at the duo with devious eyes.

"You thought that puny amulet of yours can kill me?" the spirit laughed, as her fire hands started to circle around the two. Dipper held onto Pacifica for protection, watching the circling fire going around them cautiously. He held onto his amulet to charge up more power, trying to figure out a way to destroy the beast, but he felt a warm sting crawling up from his leg.

Dipper then saw that his left leg was on fire, burning his skin on the inside.

He pushed Pacifica away as hard as he can in a fit of panic, making sure she wouldn't get burned. The blonde landed on the hard floor and watched her friend's leg go on fire, and the blaze of it started to form a hand. Dipper tried his best to remove the fire from his formal pants, but nothing worked.

A palm formed, then fingers, then a wrist.

Before Pacifica knew it, Dipper was in the Mulier Ardens' grasp, the hand burning his skin off and slowly burning a bit of his clothing too.

"D-D-DIPPER!" Pacifica screamed, her eyes starting to feel watery. Her friend was stuck in a hand of fire.

She turned her gaze to the Mulier Ardens' eyes, feeling hatred growing inside of her heart, wishing she could instantly destroy the fire woman.

The Mulier Ardens now had a full on laugh, as she held her 'trophy' in the air and started to swing Dipper's body playfully. "He had so much high hopes!" the Mulier Ardens laughed. "That's what you get for doubting my powers, ruthless child!"

Pacifica, in a fit of anger and frustration, ran up to the Mulier Ardens and started to kick, punch, and even spitted on it's large figure, only to get burns all over her clothing and skin. "Let... go... of... DipDop!" Pacifica pleaded, growling.

The Mulier Ardens looked down at Pacifica, pretending like she wasn't even attacking her. With one flick of fire she conjured easily, Pacifica was easily knocked out and pushed to the ground, burns all over her clothing and body. She felt tears flowing down her cheeks, but she didn't even bother to stop crying. Her sweater and beautiful dress were half burned, her hair was a mess, and her purse laid lying on the floor, all of it's contents spilled everywhere.

Her phone, some bus tickets, her wallet, and an emergency flask that held Pacifica juice...

That's when an idea came to her head.

Pacifica rushed over, ignoring all the stinging and dying pain in her body, and grabbed the plastic flask; untwisted the cap, and stood up to face the Mulier Ardens.

"Hey, ugly!" Pacifica shouted loud and proud, her confident voice booming the cavern. She was glad that it was loud enough to catch the fire demon's attention.

The Mulier Ardens turned around and looked at Pacifica, a blue fireball growing in her other hand and Dipper burning in the other. He seemed fine, aside from the Mulier Ardens' tight clutches, and Pacifica was surprised that he still was charging up the amulet's power.

"What do you want? Another fire flick to knock you out?" the spirit tormented, showing Pacifica the fireball she was creating on her other hand.

"Nope! Dear Marvis Aidens, I just hope you're THIRSTY!"

Pacifica threw the cap to the side with no hesitation and threw the shimmering, sprinkles and glitter mixed drink onto the Mulier Ardens' gown, hoping that it'll get something happening.

Just like what she was expecting, nothing happened. The juice instantly burned along with the Mulier Ardens' dress.

The Mulier Ardens howled with laughter.

"Are you serious?! You thought some pink drink would kill me, the woman of fire?" the Mulier Ardens seriously asked. "You really are a crazy and stupid child after all."

Pacifica smiled deviously. This is what she was planning.

"Dipper!" Pacifica shouted, turning her head to the brunette in the Mulier Ardens' grasp. "Catch!"

With one confident swing, Pacifica threw the still full bottle of Pacifica juice in the air, and Dipper caught the bottle with excellent gusto with the magic of his powered amulet.

The Mulier Ardens switched gazes between the girl and the boy, wondering what the blonde child just did.

"Let's see if you need a drink, Mulier Ardens." Dipper grinned deviously.

With his magic, Dipper bought the drink to himself and instantly threw it into the Mulier Ardens' mouth, tipped the bottle a bit so all of the fluid could enter in, and the Mulier Ardens' supposed irises in her eyes suddenly turned small from the shock. With her hands already occupied in two things, she couldn't remove the flask from her mouth, and Dipper forced the bottle to stay in the demon's lips. Her red fireball she was conjuring up slowly died away on her other hand.

The Mulier Ardens cried when she drank the juice.

The fire spirit instantly removed her grip on the brunette. Her hands released him from her clutches, and Dipper fell to the ground safely

He also did it dramatically- Dipper held onto his cape like a bullfighter, revealing he was tucked in the white fabric this entire time. Only a few burns covered his cape and his skin, but he looked completely fine.

The flask of Pacifica juice stayed in the Mulier Ardens' mouth, like she was a picky baby forced to drink a bottle of milk. She slowly and slowly started to melt away into the ground, nothing left of her but troubled screams and yelps for help.

As the bottle became empty, the Mulier Ardens spitted the flask away from her lips, still crying in agony. "I-I-Impossible!" she cried. "I am Mulier Ardens, the female demon of fire, how could I get destroyed by a drink?! I am supposed to rule this world, with humanity in chains and in my control! Curses... you... stupid... CHILDREN!"

Before their eyes, Dipper and Pacifica saw the Mulier Ardens disappear completely in thin air, leaving the empty flask of Pacifica juice and a gleaming, golden covered and shiny heart in where she used to lay.

The torch lights went out, but were re-lit shortly, with a more warmer feeling to it, and with a more brighter shade.

Dipper and Pacifica were used to any laughter echoing in the cavern right about now, but no voices were heard, except for their heavy breathing and fast pacing hearts.

The two walked slowly up to retrieve the items on the floor cautiously. Pacifica, grabbing her flask which still felt warm, and Dipper, grabbing the hot golden heart in his hands. They both stared at their items with shocked and surprised faces.

"We... we did it." Pacifica smiled, holding the flask tightly in her hands. She broke into a smile, and swung her arms around the cavern crazily. "We defeated Marvis Aidens!"

"Mulier Ardens, Pacifica." Dipper corrected, still staring at the small sculpture in his hands. He placed it away in his cape, making sure no one would ever take it away from him, and turned around to look at Pacifica. "I... didn't know we would beat her. I was bluffing the whole entire time, and I knew I wouldn't defeat her in the end, but..."

Pacifica's cheering and dancing suddenly came to a stop. She looked at Dipper, worried. "But, Dipper, you did amazing. Your first move was really really cool and awesome, and I'm really happy that you protected me as well. And hey, you got what you wanted in the first place, right?"

Dipper looked at her. Pacifica had an innocent and adorable face, puppy-eyes gleaming at him and waiting patiently for an answer. Pacifica, while he was pretending to suffer from the Mulier Ardens' clutches, tried her best to save Dipper and got terribly hurt in the process. Even with all of her burns and bruises, Pacifica seemed fine, like she didn't get hurt in the first place.

Her strength to continue on made Dipper fascinated. He smiled- and it wasn't a forced smile, it was a reflex he accidentally did.

He forgot what it felt like to have a genuine, honest and happy smile.

Pacifica rushed up to him and hugged him, standing a bit on her tippy-toes so that she could fully feel the hug. Dipper didn't hesitate to return the hug back, rubbing soothing circles on the blonde's back. He rested his chin on Pacifica's shoulder.

"You're right, Pacifica. However, you suffered greatly more than me..." Dipper whispered into her ear. "I.. hope you can forgive me for not helping you. I promise, I will protect you from now on and not bring you on these dangerous missions anymore."

Pacifica just held Dipper tighter. "It's okay, DipDop. I needed some fresh air. I'm glad I got to do some epic stuff with you, and defeat a fire she-demon! I wouldn't mind going on another crazy adventure like this one," Pacifica whispered back. "It feels good to be back in Gravity Falls. It feels good to be with you again."

During their embrace, the cavern's hidden doors opened shortly, revealing the outside world, and the polar-opposites walked out slowly, hand in hand.

SO that happened.

*Note: The name 'Mulier Ardens' is actual Latin for 'Burning Woman'- that is, if you write English to Latin.
However, if you do the opposite, Latin to English with all of the capitals and spellings, you'll notice that 'Mulier Ardens' actually means 'Woman burns', which, is, kind of the same thing.
If you are actually a professional and expert Latin speaker, I am TOTALLY sorry if I got that name wrong. I used Translator, which is probably the only tool I use so I could understand other languages... yeah

*Another note: DON'T ASK ABOUT DIPPER'S NICKNAME 'DIPDOP'. I THINK IT'S AN ADORABLE IDEA AND NICKNAME I SEE EVERY TIME I GO ON TUMBLR AND I JUST WANTED TO ADD IT TO THIS FANFIC GAHHH

*And yet another note: Mulier Ardens' weakness: Pacifica juice or being extinguished inside out? Both, probably.

Review Time!

Aqua Girl 007
I know, right?! Glad you enjoyed Chapter 2! (And hey, I also hope you enjoyed this one as well! For some reason it took me a butt load of time to finish, but I really like the ending product!) Still working on your other adorable prompt idea :'D

anxresi
Huh... you're right, maybe Pacifica should've waited for the next day... she almost died 0_0

vihigu (Guest)
This is an awesome idea, since I am also a huge fan of Steven Universe! I'm working on it, so I hope you look forward to it!

Conor (Guest)
Aw, that's an adorable idea, I can see it! I'm also working on your other prompt idea, and I hope you will enjoy the chapters to come!

Rorscarch
Sure! I'll try my best to do another Reverse Pines/Reverse Falls fic (since they're actually pretty fun to do) and I'll give the Monster Falls one a shot! Thanks for your ideas :)

Mister L
Thank you! Glad you're enjoying the Dipifica ride! (And also, love your icon, Luigi/Mr. L is the BEST!)

TheBoredGuy (Guest)
Thank you! I might try another epic Dipifica fic sometime in the future. Any idea you have will be appreciated!

Stay awesome!