After the experience of running into Temmie Village, the Warners found another room similar to the one with the light-up mushrooms, but with glowing pink crystals instead. The sign said "Without candles or magic to guide them Home, the monsters used crystals to navigate."
"Oh," said Wakko, "so we gotta follow the crystals."
"Sounds about right," said Dot.
As they walked through the maze, lanterns were everywhere, but spread apart from each other to make it harder to find them. To make things worse, the lighting got dark easily. If there was a blackout before they found a lantern, chances were they'd be stuck there forever. Well, maybe not forever, but it would certainly feel like it. After the first two lanterns, which were relatively easy to find, a pair of Moldsmal bumped into the Warners. Yakko wiggled his hips, letting Moldsmal A spare him, but Moldsmal B turned into Moldbygg. Moldbygg's attacks were different, consisting of bullets that closed in on them.
"Whoa!" said Yakko, rolling out of the way. "Look, I get it. I'm not even gonna get near ya."
Admiring his respect for boundaries, even though it was arguable that he didn't have any, Moldbygg spared him and left behind some gold. As they continued on their way to find the third lantern, it was quickly getting dark again.
"There!" Wakko pointed.
They ran left, forward, right, forward, left, and right again, then found the next lantern. But before they could activate it, Woshua and Aaron ran into them. Doing what they normally did, they spared the duo and continued. Going right and taking another right right afterward, they made it to the next area of Waterfall. Walking across the river, it got dark in a flash.
"Hey," said Wakko, "who turned out the lights?"
"I can't see anything two feet in front of me!" said Dot.
"I've got a bad feeling about this..." said Yakko.
They stepped onto stable and dry ground.
"We need somethin' to lighten the mood," said Yakko, whose pun was accompanied by Wakko playing the drums.
"What's that echo flower doin' here?" said Dot.
A feminine voice, slightly reminiscent of Jane Lynch, spoke from the flower, slow enough to sound intimidating.
"Behind you."
They turned around; the lights turned back on and they saw Undyne standing there. The Warners groaned. Undyne had attacked long enough for them to no longer be afraid of her. Now, they pretty much knew what to expect.
"Not again!" Dot complained.
"She never gives up, does she?" Yakko said to himself before facing Undyne. "Fine, let's get this over with. Whaddya want?"
"...Seven."
"Huh?" said Wakko.
"Seven human souls. With the power of seven human souls, our king...King Asgore Dreemur...will become a god. With that power, Asgore can finally shatter the barrier. He will finally take the surface back from humanity...and give them back the pain and suffering that we have endured."
"But what does that have to do with us?" said Yakko.
"I always thought that the seven human souls were what we needed. But you three...something's different about your souls. They're way more powerful than the souls we already have combined. One of your souls is strong enough to shatter the barrier on its own. Understand, humanfolk?"
The Warners nodded, knowing that toons held a deal of great power. From what they got out of Undyne's explanation, Undyne had to kill only one of them to break the barrier. Hopefully she would be merciful to leave the other two alone.
"This is your only chance at redemption."
"Our redemption?" said Dot, finally getting the opportunity to lash out at the knight. "What about you?! I saw what ya did back there the other day to that poor, sweet skeleton! If anything, you're the one who needs a redemption! No one, and I mean no one, hurts my Papyrus!"
She took out her mallet and smashed it on top of Undyne's head. However, Undyne acted like a sturdy boulder and was unfazed. Dot, on the other hand, started shaking due to the harsh impact, then fell to the floor as Yakko and Wakko dragged her away.
"Pathetic," said Undyne, starting to lose her temper and making eye contact at Dot. "You know what? Maybe I should kill you first."
"Fight me!" she growled.
"Unless one of your brothers wants to give up their soul instead."
"No way!" said Yakko. "You're not gonna kill us and get away with it!"
Undyne paused to stop herself from yelling at the toons and calm down.
"I'm gonna say it one last time. Give up your souls...or I'll tear them from your bodies."
She took out her spear and charged. Yakko and Wakko took out their mallets as well, hoping they would be enough to defend them from Undyne. But they didn't forget Sans' advice to catch her off-guard, which meant that it probably wouldn't be very useful if they wanted to live. The trio braced themselves for the battle to begin. However, Monster Kid jumped in between the knight and the kids.
"Undyne!" he shouted. "I'll help you fight!"
Yakko chuckled. He was right; pretty much every event that happened in the Underground seemed to be conveniently-timed and in their favor. Meanwhile, Monster Kid looked from side to side, constantly switching his attention between Undyne and the Warners. Finally, he stopped and stared at Yakko, Wakko, and Dot.
"YO! You did it! Undyne is right in front of you!"
"And holdin' a spear," said Wakko, hoping it would make him realize the situation.
"Yeah, you've got front row seats to her fight!"
But as he looked around, he saw that no one was there. He looked at the readers, as if acknowledging their presence.
"...wait. Who's she fighting?"
If only he could hear their responses. Yakko opened his mouth to speak for them, but was cut off when Undyne put her spear away, grabbed Monster Kid by the face, and dragged him away, abandoning the Warners.
"H-hey!" he shouted. "You aren't gonna tell my parents about this, are you?"
The echo flower repeated this single line of dialogue, much to the Warners' amusement.
"Well," said Yakko, "we've got a slight chance that we'll never be seeing her again."
Sure, it was unlikely, but it was also wishful thinking. Nothing wrong with that, right? As they walked back on the river, they found another passageway. It led to a hallway filled with echo flowers. The passing conversation from the previous day seemed to continue.
"...hmmm...if I say my wish...You promise you won't laugh at me?"
"Of course I won't laugh!"
"Someday, I'd like to climb this mountain we're all buried under. Standing under the sky, looking at the world all around...That's my wish."
They heard laughter.
"...hey, you said you wouldn't laugh at it!"
"Sorry, it's just funny...That's my wish too."
The Warners smiled. Assuming this was a sibling moment, it was really sweet. A sign on the wall revealed the last part of the alluring lore that they needed to know.
"However..." Yakko read, "There is a prophecy. The Angel...The One Who Has Seen The Surface...They will return. And the underground will go empty."
But the question still remained: which one of them was the angel? They didn't have enough time to think about it as they crossed a slightly unstable bridge.
"Yo!" a voice shouted, stopping them from crossing the bridge.
"Monster Kid?" said Dot as she turned around. "What are ya doin' here?"
"I know I'm not supposed to be here, but...I wanna ask you something."
"Shoot," said Yakko.
There was a brief pause.
"Man, I've never had to ask anyone this before...Umm...Yo...You're humanfolk, right?"
"Yeah!" said Yakko. "We're cartoons, straight from the surface!"
"Cool! Haha. Man! I knew it! ...well, I know it now, I mean...Undyne told me, um, 'stay away from those humanfolk.' So, like, um...I guess we're gonna be enemies or something."
Dot responded first.
"We don't have to, ya know."
"But we're supposed to! Um, at least that's what I've been told. But I kinda stink at that, haha. Yo, say something mean so I can hate you? Please?"
The Warners exchanged glances.
"Nah," said Yakko, "you're too nice."
"Yo, what? So I have to do it?"
"Show us whatcha got," said Dot.
"Here goes nothing..."
He took a deep breath.
"Yo, I...I have your guts."
The Warners tried not to snicker; it was the lamest phoned-in insult they ever heard.
"...Man, I...I'm such a turd."
This made it even harder for them to not laugh.
"I'm...I'm gonna go home now."
"Bye," said Wakko, waving as he left.
Monster Kid walked away, but tripped and hung from the edge of the bridge by his head. The Warners immediately got serious.
"Yo, w-w-wait! Help! I tripped!"
Yakko immediately flashed back to when the bridge gave away beneath Wakko's feet and he almost fell to his death. Lucky enough that he survived, Yakko was gonna make sure the same thing happened with Monster Kid as his big brother instincts kicked in.
"Hang on, I'm comin'!"
He ran and slid to a halt, not taking his eyes off Monster Kid. However, it meant that he was too busy to notice Undyne approaching. She reached for her spear, finding this as the perfect opportunity to kill Yakko and take his soul, but Wakko and Dot stopped her. They protected him by giving her the death glare, also known as the "You lay a finger on our brother and you're dead" look. It wasn't intimidating, but Undyne took a few steps back, admiring the way they looked out for their older brother.
Yakko grabbed Monster Kid's cheeks, not able to find his arms (if he had any), and lifted him up.
"Gotcha!"
He placed him back on the bridge, both finally noticing Undyne's presence. Monster Kid felt an exclamation mark appear above his head as he realized Undyne attempted to murder the toon that saved his life. He stood in front of Yakko, defending him from Undyne.
"Y...y...yo...dude...If...If y-you wanna hurt my friend...You're gonna have to get through me, first."
Undyne hesitated. She was against hurting her kind, so she took a few more steps back, then started walking away.
"She's gone..."
"Not bad, Monster Kid!" said Yakko, rubbing Monster Kid's head. "Not bad."
"Yo, you really saved my skin. Guess being enemies was just a nice thought, haha. We'll just have to be friends instead."
"Sounds good to us!" said Wakko.
There was a brief moment of silence.
"Well," said Yakko, "ya better get goin'. Your parents are gonna be worried sick!"
"Yeah, I should really go home."
"If there's anything else ya need, come to us."
"Thanks, Yakko. See you guys later!"
He scurried away.
"Bye, Monster Kid!" said Dot.
"And try not to fall off any more bridges!" said Yakko in a playful tone.
Monster Kid laughed, then disappeared.
"Nice kid," said Wakko.
The Warners passed through another bridge and stopped in front of a mountain with a cave entrance. Standing on the very top of the mountain was Undyne, looking away.
"Seven. Seven human souls, and King Asgore will become a god."
"Ya already said that!" said Yakko. "Just get to the point!"
Undyne clenched her fists.
"Quiet, I'm getting there!"
She cleared her throat and continued, looking to the side.
"Six. That's how many we've collected thus far. Understand? One of you will be the seventh and final soul, and not only will the world be transformed, but you will give us the power to do even more. First, however, as is customary for those who make it this far..."
She faced them.
"I shall tell you the tragic tale of our people. It all started, long ago..."
"Don't we already know this?" Wakko whispered.
"Yeah," Dot whispered back.
"No, you know what? I've had it with all your crazy antics! SO SCREW IT! WHY SHOULD I TELL YOU THAT STORY WHEN YOU'RE ABOUT TO DIE!?"
The Warners jumped back at this. Seeing the knight get so angry made her even scarier than the times she ambushed them.
"NGAAAAAHHHHHHHHHHHHHHHHH!"
She took off her helmet to reveal blue scales with an eyepatch and a red ponytail.
"Whaaaaaa?!" Wakko exclaimed.
"We're up against a scary fish lady, guys!" said Yakko. "This is gonna be good..."
"YOU! You're standing in the way of everybody's hopes and dreams!"
"Actually," said Dot, "we're gonna ma-"
"SHUT UP! Alphys's history books made me think the surface was cool...with giant robots and flowery swordsmen."
"Wonder where she got that from..." said Yakko.
"BUT YOU THREE? You're nothing but cowards!"
"Exsqueeze me?" said Yakko, speaking up. "Didn't ya see what I just did back there?!"
"Yeah, you were hiding behind that kid just so you could run away from me again!"
Yakko gave up. What was the point if she wouldn't listen to common sense that even toons as illogical as the Warners have?
"And let's not forget your 'great people skills' schtick! Oooh! We're making such a difference by making everybody fall in love with how perfect we are! You know what would be more valuable to everyone? IF YOU WERE DEAD!"
"That's harsh," said Wakko.
"That's right, humanfolk! Your continued existence is a crime! Your lives are all that stands between us and our freedom!"
"Uhhhh...she actually has a point there," said Yakko.
"Right now, I can feel everyone's hearts pounding together! Everyone's been waiting their whole lives for this moment!"
"Yeah," said Yakko, "they're gonna finally see the day when you lose!"
"Oh, please. I'll show you how determined monsters can be! Because when everyone puts their hearts together, they can't lose! It's time to end this right there, right now! And maybe I can shut that mouth of yours! Step forward when you're ready! Fuhuhuhu!"
The Warners put on fierce faces and didn't move. A twinkling star, which wasn't there before, gave them a boost of energy. The wind was howling as they were filled with determination.
"That's it, then...! No more running away!"
Undyne took out her spear.
"HERE I COME!"
She charged as the Warners' souls activated and they found themselves being pulled closer to her. But instead of stabbing them right away, her spear passed over their heads. Their souls, along with their bodies, turned green. The boundary boxes also seemed to surround each Warner individually.
"En garde!"
The Warners found out that they couldn't move their feet in a walking pattern, but they could pivot to all directions. A blue shield also appeared, seemingly glued to one of their hands.
"Uh, guys?" said Yakko. "I'm stuck."
"Me too," said Wakko.
"Me three!" said Dot.
"As long as you're green," she explained, "you can't escape! Unless you learn to face danger head-on...You won't last a second against me!"
"Bring it on."
She threw three arrows at him. As Yakko deflected them with his shield, he noticed that the arrow about to hit him first turned red. And once it hit his shield, the arrow coming next turned red as well. Undyne flashed a menacing smile.
"Not bad! Then how about THIS!?"
This time, she aimed at Wakko. She threw two spears towards his front, two towards his left, and two towards his right. He deflected all of them. Undyne held her fist in front of her head and shook it. Now, it was Dot's turn.
"Too easy!"
The bullets got faster.
"For years, we've dreamed of a happy ending..."
Left, right, left, right, right, left, left. Dot deflected all the arrows except for one, which hit her in the back. The cycle of Undyne's focus repeated in this pattern.
"And now, sunlight is just within our reach!"
Right, back, left, forward, right, back, left. Yakko could sense the arrows coming from all directions.
"That's why we don't have to fight!" he said, responding to Undyne.
Four quick forwards and his turn was over. He smiled to himself, liking how Undyne's arrows seemed to match the hectic background music.
"Just let us stay alive. We'll break the barrier on our own and nobody gets hurt."
"No one can break the barrier and stay alive at the same time, humanfolk!" said Undyne, refusing to let her guard down.
"Well, it was worth a shot."
She suplexed a huge boulder just because she could, but didn't hurl it at Yakko.
"Your lives are the very things trapping us down here and I won't let you snatch it away from us!"
Left, forward, forward, right, forward forward, left, forward, back!
"Whoa!" said Wakko, almost tripping over himself as he deflected the last arrow.
Undyne thought of her friends and pounded the ground with her fists.
"NGAHHH! Enough warming up!"
Left, forward, back, right, left, forward, back, right, back, forward! Dot got hit twice, reducing her health to almost three-quarters. Undyne passed her spear over the Warners' heads again, turning their souls and color schemes back to normal. She threw another spear coming from Dot's direction, wanting to hit all three of them. Reacting quickly, they all ducked. The scent of sushi filled the air as the three boundary boxes combined into one.
"Are ya sure ya don't wanna spare us?" said Yakko.
"Mercy? Ha! You might as well run away!"
A light bulb formed over Yakko's head.
Run away! That's it!
Undyne threw clusters of spears all around the boundary box, making the Warners run from side to side. When this attack ended, he whispered his plan to his siblings, then they faced the knight once more.
"Well," Yakko told Undyne, "ya asked for it."
Yakko patted Wakko's back, making Wakko walk up to Undyne. Wearing his tough boxing gloves, he punched her in the jaw; it didn't do much harm.
"Tag, you're it!"
They slid under her legs and ran inside the cave of the mountain. They laughed as they ran, sensing that Undyne was indeed caught off-guard and chased after them. She started to gain up on them, however, and as they crossed a nearby river containing large ice cubes, she managed to swing her arm around Yakko, lifting him up and pinning his arms by his sides to prevent him from wiggling free.
"Gah!"
Wakko and Dot turned around and saw what was going on.
"Yakko!" they shouted.
"Help!"
Undyne passed her spear over Yakko's head, turning him green again before he could escape.
"You won't get away from me this time!"
"Well," said Dot, "we're right here if ya need us."
Wakko started stuffing his face with every healing item they had while Dot kicked back to read a magazine. Yakko faced Undyne again.
"Can't we just be friends?"
Undyne paused. She remembered someone...her attacks became a little less extreme. Yakko realized he must've gotten to her.
"Honestly, I'm doing you a favor..."
Forward, back, forward, back, back, forward, back, forward.
"No human has EVER made it past Asgore!"
An arrow was coming slowly from the left...but Yakko could sense one coming rapidly at his front.
"Yikes!"
He pivoted as all the other arrows started coming quickly. Front, right, back, front, right, back, and finally left!
"Killing you now is an act of mercy!"
Right, right, right! Left, left, left! Yakko got hit by an arrow coming from behind him and winced, but he deflected another from the front. He deflected another arrow from behind, but got hit again by one aimed at his head. It hit him right in the ear.
"Ow!"
"So stop being so damn resilient!"
Forward, right, back, right, right, right, forward, back. The next set of arrows were faster. Right, forward, left, left! She passed her spear over his head and he ducked. She immediately passed her spear over his head again, grabbing his bad ear to stop him as she expected him to make another attempt at escaping.
"Oh, no you don't! You've escaped from me for the LAST time! Alphys told me humans and humanfolk were determined..."
Right, left, right, left. But the next arrow looked different. It came from the right, but had its back facing Yakko. Just as it was about to hit him, it flipped itself around and was about to hit his left side. Yakko gasped and tried to pivot, but was a little too late and got hit. Dot looked up from her magazine.
"Ooh, this is gettin' good!"
Wakko stopped eating and watched the fight with her. Undyne bounced impatiently.
"I see now what she meant by that!"
Right, left, back to front, back, left, right, up, back to front.
"But I'm determined, too!"
Rapid left, back, right, forward, right to left, front to back, left to right, and back to forward!
"Determined to end this RIGHT NOW!"
Right, right, left, left, back, front to back, forward, hit by a back to front, back, right, left!
"Woo!" Wakko cheered.
"You got this, Yakko!" said Dot.
"...RIGHT NOW!"
Left, forward, left, right to left, hit by left, right, almost got hit by right, left to right, forward!
"...RIGHT...NOW!"
Right, back, right, left, back, right, back, left, right, right!
"Now I'm gettin' the hang of it!" said Yakko.
"Ha...Ha..."
Left, left, three close lefts, left, right to left, left, right to left, right, left to right, right, left to right! Undyne towered threateningly over Yakko.
"NGAHHH! DIE ALREADY, YOU LITTLE BRAT!"
Right to left, front to back, left to right, back to front, and repeat this combination twice! Undyne passed her spear over Yakko's head, and he ducked for the third time. He took the toy knife out of his belt and decided to escape when he got the chance. He hit her right cheek, but it wasn't enough to actually hurt her.
"Tag, you're it!"
He ran away, dragging Wakko and Dot with him.
"STOP RUNNING AWAY!" she shouted, going after them once more.
"Catch us if ya can!" said Dot.
The narrow path led them further into the cave. The wall next to them had a long sign saying "Welcome to Hotland".
"COME BACK HERE, YOU LITTLE PUNKS!"
Suddenly, Dot's phone rang. She looked at it and saw Papyrus' name.
"Really, Dot?" said Yakko.
"What, I can't let him go to voicemail!"
He rolled his eyes as she answered the phone.
"HEY!" Papyrus greeted. "WHAT'S UP!?"
She rapidly explained her situation.
"Papyrus, now's not a good time to chat! We're in the middle of a very intense game of tag with Undyne!"
"OH, SO YOU'VE ALREADY MET-"
"I'll call you back in few minutes, ok? Bye!"
She hung up without giving Papyrus a chance to say goodbye. The setting changed and the Warners found themselves in a volcano-like environment.
"Boy," said Yakko, "it's gettin' hot in here!"
"Look," said Wakko, "it's Sans!"
He pointed to a sentry-station, where the lazy skeleton was taking a nap. They stopped for a moment and they yelled at him.
"Sans!"
"Sans, wake up!"
"Sans, stop sleeping and help us out here!"
Undyne was getting closer.
"Oh well," said Yakko.
They continued running, Undyne stopping to shake Sans and wake him up. The Warners crossed a bridge, making sure they didn't fall into the pit of lava below them, and they tumbled on the ground once they reached the other side, exhausted.
"That...was somethin'..." said Yakko.
"Yeah...sure was..." said Dot.
Wakko was already on his way to the cooler placed by his side. Meanwhile, Undyne caught up to them.
"Armor...so...hot...But I can't...Give up..."
She passed out on the bridge, looking dry.
Wakko turned around to look, drinking his cup of water before it could evaporate.
"Uhhhhh...Undyne?" said Yakko, approaching the fish knight and waving his hand over her face. "Hello?"
No response.
"She's out cold. Or should I say out hot?"
He chuckled and went over to the cooler. He got a cup of water and returned to Undyne.
"Hey, wake up!"
He threw the water on Undyne's face. Her body started shaking, then she got up. After looking to her left and right, she set her eyes back on the Warners. They stared at each other in awkward silence for a moment...then she walked away without saying a word.
"That was weird," said Yakko.
Dot suddenly remembered. Now that the fight was over, she could call Papyrus. She picked up her cell phone and called him.
"Hey, Pap! I'm back!"
"HELLO, DOT!"
"So, what did ya wanna say?"
"OH, I WAS JUST THINKING...YOU, ME, YOUR BROTHERS, AND UNDYNE SHOULD ALL HANG OUT SOMETIME! IT SOUNDS LIKE YOU'RE ALREADY GETTING ALONG!"
Dot giggled.
"I KNEW YOU WOULD MAKE GREAT PALS! LET'S MEET UP AT HER HOUSE LATER!"
"Sounds like a plan. See ya there, sweetheart!"
She hung up.
"Well?" said Wakko.
"We're goin' to Undyne's house!" said Dot, cheerful despite what just happened a few minutes ago; her brothers were the same way. However, the trio, especially Yakko, didn't feel like walking all the way back to Waterfall.
"Just skip to the next chapter."