Epic of Caterpillar

"W-What is that metallic titan thing?!" The Ruler of the Necrotic Plane was completely flabbergasted! All of his attacks were not even affecting it, as the mech generated a powerful barrier made of the combined divinities and powers of all the wolves, and all the other beings within their divine realms!

"[Rainbow Kaiser EX2: Code Wolf]: [Kaiser's Divine Claws]!!!" All of the Wolves howled at the same time, their prowess merging with the almighty mech!

The claws of the mech suddenly grew ten times as big as trillions of nanobots and divine power were added into the mix. The might of the wolves mixing together, slashing apart anything in front of them!

SLAAAAASH! SLAAAAASH! SLAAAAAASH!

The slashes made of rainbow light pierced through everything, tearing apart any monster and foe in front of them, as Loki and company swiftly made their way into the center of the whole realm, Hel's castle could be seen in the distance, where Hel herself was!

"T-There it is! The castle! We're getting closer now!" Loki said in surprise.

"Move aside!!!" Roared Fenrir.

"No amount of monsters will stop us from reaching our beloved sister!!!" Jormungandr roared.

The two Divine Beast brothers tore apart anything that slipped off Rainbow Kaiser's might, while Loki constantly recovered her energies and prepared herself to unleash all her powers on Hel one last time, whenever she got close enough.

FLUOSH!

Suddenly, a portal coming from Rimuru's Divine Realm opened, as a pale man with long white hair and sharp red eyes, wearing a black cloak emerged, holding a big, scythe-like staff and standing above a gigantic skeleton dragon, his Maxima Summon.

"Redgaria!" Rimuru said in surprise. "You're getting out?! But it is dangerous!"

"Dangerous my ass! I'm coming for my sister now!" Redgaria said. "I've waited enough, Rimuru!"

"Wait, my lord! At least let me help you!" Sapphira Diamantine surged behind him, the former Frost Champion that became one of his zombie servants, had grown a very overprotective nature over Redgaria.

"Don't worry, Rimuru, I'll be accompanying him as well!" A Skeleton Knight said, wearing black blazing armor, it was nobody else than Herbell, Zehe's adoptive father and former servant of Redgaria.

"Sigh, if my father is going then I am too!" Zehe said. "I'll protect them."

"Thank you!" Rimuru nodded, as she continued pummeling the endless wave of attacks coming from literally everywhere, even the skies.

"[Rainbow Kaiser EX2: Code Wolf]: [Divine Kaiser Turbo Mode]!!!"

The power of the wolves concentrated into the gigantic, rainbow mech, as it quickly grew enormous angelic metallic wings, flapping them rapidly and flying across the skies while unleashing beams everywhere!

BOOOM! BOOOM! BOOOM! BOOOM! BOOOM!

"Now! [Rainbow Kaiser EX2: Code Wolf]: [Extension Arms]!"

FLUOOOSH!

The two arms suddenly grew several tens of times longer, grabbing Fenrir, Jormungandr, Yiksukesh, Loki, and even Redgaria, Sapphira, Herbell, and Zehe, as the titanic mech carried them into the skies, fighting and firing lasers and slashing attacks with claws as they made their way into the castle!

FLAAAAAAAASSSSH!

"RAAAAAHHH! I CAN'T HURT THIS THING AT ALL!!!" The Necrotic Ruler was left completely perplexed and frustrated; he couldn't even make a dent on the mighty mech!

Gigantic fists surged from within the surrounding castle. The reason he couldn't move the castle away was because its position was important, it was right above the circuits connecting Hel to the Realm's Core of Helheim, a small movement and his possession would severely lose power over her!

"DIEEEEE!!!"

The gigantic fists, big enough to shatter even asteroids and meteors rushed down, pummeling the earth, and attempting to bring Rainbow Kaiser EX2 with them!

However, the mighty combined wolf mech fought back wildly! Howling and unleashing mighty beams and powerful slashing attacks from laser-made swords and wolf-like claws, relentlessly tearing down any attempts at crushing them.

The reason behind Rainbow Kaiser's might wasn't just the wolves, but its new composition, made out of the richest of divine and primordial metals that the Divine Realm of Kireina had produced, and merging them with the Divine Realms of the wolves themselves into a single material item.

This was the secret of this mighty mech, it was made out of the very Divine Realms of these wolves! It was so almighty it couldn't be broken down so easily, and even as it gained countless bruises and small cracks, it continued to regenerate thanks to the super advanced magic divine tech produced by Kireina's still-living System and A.I. wife, Andromeda!

"Hehehehe! Do you truly think you can hurt the Rainbow Kaiser EX2 with just physical attacks or death magic?! You're sorely mistaken, Necrotic Plane Ruler!" Andromeda laughed, as she constantly managed millions of system windows at once, conjuring skills, magic, and all sorts of enhancements and buffs, healing, and more, to everyone all at once! "As long as we are together, Kireina's will remains within us!"

DING!

She touched a single big red button.

"Now, Wagyu! DO IT!"

"ALRIGHT!"

Wagyu howled, spending almost all of his Divine Energy into the Rainbow Kaiser EX2, as its colors started flashing with bright neon rainbow lights, overcharging itself to the limits!

"[Rainbow Kaiser EX2: Code Wolf]: [SUPER OVERDRIVE]!!!"

FLAAAAASSSSHHH!!!

Overdriven with tremendous quantities of Divine Energy, the titanic mech flew across all obstacles at once, even space distorting void beams and gigantic hands made of death stone and nether, landing over Hel's castle barrier and shattering without a single problem!

CRAAAAAASSSSSSHHH!!!

BOOOOOMMMM!!!

The gigantic mech landed right in the middle of the hue castle, devastating everything on its path and opening a big way for everyone to finally enter its depths!

"NOOOOO! STOP!!!" The Necrotic Ruler screamed, making the entire Realm tremble.

Giant spikes made of pure void started falling over the castle to stop them, only for Rainbow Kaiser EX2 super speed to easily catch them all, slicing them apart in midair as countless explosions spread across the sky!

BOOM! BOOM! BOOM! BOOM! BOOM!

"It is useless, Necrotic Ruler!" The wolves roared pridefully. "We possess something that you don't! And that's called… The Dao of Unity!"

FLAAAAAASH!

A bright Dao shone within the Origins of all the wolves. In fact, of everyone that was related to Kireina! This bright, celestial Dao was naturally formed from their unity, their bonds, and their love for one another, and Kireina!

It was a mighty Dao created from her absence, a Dao that made them feel even more together with one another, and awakened powers never seen before when friends and family unified as one!

Redgaria led the party as they ran across the halls of the Death Castle of Hel, of course, Jormungandr transformed into his humanoid form, and so did Yiksukesh so they could fit inside.

Entering its depths and final arriving in the Throne Room, they finally found Hel, her unconscious body was resting over the floor, right in the middle of a gigantic Necrotic Circle connecting with divine circuits to the Necrotic Plane.

And at the end of this circle, there was a pale, trembling zombie girl with blonde hair and a fearful expression in her face.

"W-What is happening?! W-Who are you?! W-What do you want of Miss Hel?!" She cried, suddenly pointing a black sword against them.

Redgaria instantly recognized her, even if she had changed so much…

After so long, Kireina, even without being here, had fulfilled her promise.

"Sister!"

Author's Note: Tomorrow's is the last of Act II, so we're going back to Kireina's last stand in Grand Terra