Hello everybody! Welcome to the first ever Chains of Reality omake, The Crystal Leviathan!

This is nothing more than a sidestory to show what the twins were doing during the beginning of the Proto-Lucy arc, of which this little piece takes place at.

The main purpose of this story, and of this "omakes" sidestory as a whole, is to provide you some Chains of Reality-related content to fill the void between the gaps in each story arc. And no, for the most part, you don't have to read this in order for things to make sense in later chapters of the story: In case such a thing were to happen, a quick recap will be done in the main story to fix it.

Also, this is a two-parter.

Now, let's not blabber on any longer, let's get going!


The Loud House Backyard...

The twins sat in front of Leni, who was sitting underneath the tree.

"So, Leni," Lola remarked, getting the girl's attention. "What's this last mission you're talking about?"

"Yeah," Lana inquired, tilting her head. "I thought we already did everything we needed to do after we beat our knock offs."

"You managed to channel your true power to defeat them, yes," Leni folded her arms. "But can you, like, access that power on your own?"

The twins exchanged looks, not quite sure on what Leni meant. But then they got an idea and transformed into their angel forms.

"No, that's, like, not the power I'm talking about," Leni said. "I'm talking about the power from your other forms. Y'know, the ones you used to defeat your other selves?"

The girls now understood what their older sister meant, and exchanging worried looks, they closed their eyes and lowered their head as they tried to access said power.

As Leni waited, she noticed Lana and Lola being surrounded by a flowing blue and pink aura respectively. The twins narrowed their eyes as the aura flew slightly faster, and glew brighter...

But just as they were engulfed in light, the twins lost concentration and went back to normal, where they saw Leni closing her eyes and shaking her head.

With that done, Lana sighed, "I don't think we can."

"Then there's still one more thing you must do before you can even consider mastering your caste's abilities," Leni put her palms close together and charged some energy. "Proving yourselves as the new, true masters of the caste."

"And beating our counterparts didn't count?!" Lola exclaimed in frustration.

"That only means that you were stronger than them," Leni shook her head. "Now you must, like, prove that you're ready to lead the castes, once the progenitors have been dealt with, of course."

"How are we going to do that?" Lola asked with a whiny tone. "And do we have to do it now? We're still pooped from the fight at Atlantis."

Leni hummed to herself, then smiled. "Okay, how about I, like, have you take the test a week from today?"

The twins exchanged looks, then nodded and shrugged, seeing no problem with the proposed schedule. Leni nodded, stood up, and walked back inside, leaving the twins to their own devices.

Later that night...

Leni and Carol were at the kitchen, eating dinner together. The former took a bite out of her food before stopping, however, at the latter's disapproving look.

"Please, Carol-"

"Not a chance!" Carol snapped at the fashionista. "It's one thing to ask me to take you and the twins to another dimension, it's another to take you girls and the twins to that dimension after what happened at the beach!"

"H-Hey, look at it this way," Leni shrugged with a nervous smile. "At least we, like, know things will be dangerous this time!"

"The answer is still no!" Carol slammed her fists down the desk. "And besides, you and Lori can do the same thing together, why not ask for her help?"

Leni frowned and looked elsewhere. "We can't trust our counterparts to, like, let us do it, but you can do it on your own free will, so-"

Carol stood up and shook her head. "Even so, I just can't do it, Leni. Not after what the twins just went through."

"So you'd rather leave them as they are?"

The cross-caste stopped and turned around, noticing Leni looking at her with a stern, disapproving look as she stood up and added:

"Carol, you know that the twins have come a long way, but they need to do this to further their training."

Carol frowned. "But-"

"Our full power is the only thing that can stand up against the progenitors, Carol!" Leni snapped, folding her arms. "The twins are so close to taking another step towards it! All they have to do is go to that dimension, and pass the test! That's it!"

Carol blinked twice. "Leni, listen-"

"No, Carol, you listen: You're the only one who can take us there and the only way to help twins be totes ready for the next progenitor attack!" Leni snapped, stomping the ground. "So you either help them pull this off, or you stand back and watch them stagnate!"

The cross-caste, shocked by Leni's aggressiveness, looked at the ground as she thought about it, then nodded and stated:

"Alright, I'll do it."

Meanwhile, at the twins' bedroom...

Lola had fallen fast asleep on her bed, while Lana was talking with the house pets, while petting Hops.

"And so, she told us that we needed to do one more test before we could use our full power whenever we want. At least, that's what I got from her," Lana told the pets. "What do you guys think?"

"Well, if it'll help you fight the progenitors, and Leni isn't on their side, I think it something you should do," Charles remarked, waggling his tail.

"And besides, you may be overshadowed eventually... Actually, scratch that, you will definitely be overshadowed," Waltz said, rolling his eyes. "So being remembered as the first sister who can access her goddess form sounds like a good deal to me!"

Lana tilted her head. "Goddess form?"

The little bird looked elsewhere and hastily said "I said too much" before he flew away, followed by the rest of the pets.

This left Lana alone with Hops, who she asked, "Do you know what they're talking about?"

The frog shook his head, and Lana, having nothing else to do, went to sleep for the big day tomorrow.

The Next Day...

Leni got up, and leaving Lori and everybody else to their devices, she immediately walked to the backyard, where she saw the twins and Carol-the latter which she didn't notice at first-getting ready for the trip.

"Okay, it looks like you two are ready to go," Leni remarked as she saw the twins stretching, only to see Carol stretching as well. "Carol, what are you doing?"

"She's coming with us!" Lana chirped.

"I know that, Lana, there's no other way to get to the dimension, after all," the fashionista said. "I mean, why's she stretching as well? She's only taking us to the dimension and back."

"If I don't prepare myself to use my powers, it's very likely that my stamina issues will end up being more pronounced," Carol explained. "Or did you forget that my portal powers require a lot of stamina?"

The teenager folded her arms and frowned as she looked elsewhere. "I guess that's something I should've taken into account..."

"Hey, before we go, can I ask something?" Lola inquired, earning the fashionista's attention. "What's this test about, anyway?"

"Well, it involves dealing with, like, a little mistake the progenitors left behind," Leni somberly explained. "One they left for hundreds of years, in fact."

Lana frowned. "What mistake?"

Leni lowered her head, and sighed:

"The Crystal Leviathan."

Before the twins could ask what that meant, the team jumped through Carol's portal, and they fell down a spiraling tube of sorts, with a light at the end of it.

"So, this portal will take us to our last test, right?" Lana inquired, giving a puzzled look at Carol.

"I'm sure you're, like, supposed to ask that before we jump through the portal, Lana," Leni remarked.

"Yes, it will," Carol answered with a nervous smile. "And hopefully, it'll help motivate you to double down on your training."

Lola frowned. "We'll still have to train?"

"Everybody has to, like, train, even after perfecting their skills, sis," Leni explained. "Otherwise, you'll never be able to limit your abilities' drawbacks."

Leni threw a quick look at Carol, and the cross-casted teacher looked elsewhere just as Leni saw the light at the end of the tunnel and said:

"We're here."

The girls went through the portal and landed in a grassfield with blue grass, and crystallized rocks sprouting from the ground.

"Where are we?" Lola asked as she took a look at her surroundings.

Lana, while looking at her surroundings as well, felt a familiar feeling. "This reminds me of something."

"Welcome to the realm between Lanaspace and Lolaspace, the dimensions formerly owned by your counterparts," Carol explained, before she looked elsewhere and sighed, "And please don't ask about what happened to them after they perished."

The twins looked at Carol, seemingly ready to ask the inevitable question, only to turn to Leni and ask in unison:

"What are we doing here?"

Leni closed her eyes and took a deep breath, just as the girls' hair blew in the wind.

"Huh, weird, the wind started blowing as soon as Leni sat down," Lola scratched her chin. "Hey, do you think Leni has control over the wind?"

"I'm more curious about Carol's hair, really," Lana answered. "I mean, the wind's blowing to our right..."

Lana pointed at Carol, whose hair was blowing... the other way. "But her hair's blowing to her right! I mean, how does that work?"

Carol sat down. "Don't think about it."

The twins shrugged off that thought and sat down as well, allowing Leni to begin her explanation:

"Your final test involves dealing with the crystal leviathan," Carol generated an image of the beast as Leni continued. "A sea monster of sorts, with crystalline spikes growing and sprouting all over its serpentine body."

"A sea monster? So, it's like the hydra?" Lana asked.

"No, it's, like, an entirely different beast!" Leni reassured with a wave of her hand. "It doesn't grow an extra head thingie after you behead it, for example."

Lola rolled her eyes. "Um, Leni, I think we're going to need more details."

"Okay, how about this," Leni folded her hands. "Unlike the hydra, the crystal leviathan has some history with you. Or at least, the spirits inside you."

The twins raised an eyebrow, and Leni gestured Carol to do her thing, prompting the cross-casted girl to morph the image of the leviathan, into that of the proto-twins and two other prototypes... which looked similar to a pair of certain lovechildren...

"Eons ago, Prototype Lola and Prototype Lana, like, gave birth to twins: These were known as Prototype Leia, and Prototype Lizy."

"Those are our older proto sisters?" Lola asked, taking a closer look at the picture. "They look exactly like those girls in our mind!"

Leni raised an eyebrow and turned to Carol, who promptly explained:

"The twins used fusion as a last resort against the progenitors, maybe the girls she's talking about are related to that?"

Leni turned to the twins. "Lola, Lana, did you, like, defeat your counterparts using fusion?"

"Well, we creamed them with fusion," Lana answered with a little pride. "But no, we beat them with a new form with the help of those girls, which look identical to the ones you two showed us."

"I see," Leni smiled. "In that case, now really is the best time for you to do your final test. Anyway, let's move on."

Carol changed the image, this time it showed the prototype lovechildren fighting each other, while Proto-Lola and Proto-Lana watched from the sidelines.

"As the prototype lovechildren were specifically created to be successors to the progenitors should anything happen to them, they trained daily every day, with their respective parents keeping an eye on them."

The image changed again, this time showing a split image: to the left was Proto-Leia, who seemed to be in some crystal cavern, and to the right was Proto-Lizy, who was clearly in Atlantis.

"Everything seemed to be going well, until their last test came: Prototype Lizy and Prototype Leia were left in charge of protecting Atlantis and the philosopher's stone, respectively, against a certain duo of invaders."

"Fill-law-so-fur's stone, huh?" Lola scratched her chin. "Figured things with big words are more Lisa's thing than mine."

Lana promptly asked the important question, "Who were the invaders?"

Carol changed the image to show the answer: The twins themselves were the invaders. And as the twins realized what this meant, the image changed again: This time showing Proto-Lizy fighting Lana.

"Both prototypes fought as hard as they could, but in the end, they lost," Leni somberly sighed. "Prototype's Lizy's fight with you, Lana, was so intense that it sunk Atlantis."

The image changed again, this time showing Proto-Leia struggling on the ground, while Lola and Proto-Lisa fought for the philosopher's stone.

"And Prototype Leia could do nothing against you, Lola, but watch as you and Lisa's counterpart, like, fought for the philosopher's stone," Leni added. "The good news is the stone wasn't destroyed!"

Lola grimaced. "And the bad news?"

With a sheepish smile, Leni answered, "Lisa's counterpart has it."

Carol changed the image again to the final one, depicting the shamed prototype lovechildren underneath the proto-twins, who looked upset.

"Angry at their children's failure, the prototype twins were left with no choice but to punish them by banishing them to this dimension, but not before corrupting and merging them into the beast we know as the crystal leviathan."

The ensuing, animated merging was thankfully censored for the twins' sake. They were still horrified nonetheless.

"Why would they do that?!" Lola gasped in shock, only to quickly grow confused. "Wait, first how did they do that?"

"As divine beings, they could mess with reality to their liking, as long as it related to their powers and castes," Carol explained, scratching the back of her head. "As for why they did it, if you were to ask them, they'd give you a dozen different answers."

"None of which were true," Leni somberly interjected. "The only one who knew for sure was Lincoln, who could see that they did it as a result of them becoming corrupted."

"Corrupted?" Lana tilted her head. "So, they didn't do it willingly?"

Leni eyed the twins, then walked forward across the hallway. "We've wasted enough time explaining what happened. We need to get going."

Leni walked forward towards a cave that suddenly materialized out of nowhere, with Carol and the twins following her shortly afterwards. Once inside, they landed at the cave's rocky interior, with a giant body of water in the middle.

"Where's the leviathan?" Lana asked. "Is it here, or do we need to go deeper?"

As if fate itself had been tempted, the beast came out of the body of water soon after, with it taking a couple seconds to shake off the water before spotting the twins.

And as soon as the beast noticed them, it raised its crystal-imbued head and let out a titanic roar that shook the entire dimension.

"Oh, right, since the essence of your counterparts are, like, still within you, the leviathan will likely sense that, and assume you're the prototype twins," Leni remarked, before sticking out her tongue and gently hitting her head. "I knew I totes forgot something!"

"And it had to be the most important part!?" Carol snapped.

The leviathan charged energy in its mouth, and shot a beam at the team, separating them while also making something clear:

The battle with the leviathan had begun...