Reborn As A Ghost: Time To Build My Undead Army!

-----

I'm finally here, the Nightmare Void Dimension.

And it is… pure darkness, just like I remember it was.

Although in the distance, I can see white stars, and also floating debris, broken down houses, ancient temples, ruins.

Mountains, stone, trees, frozen water, giant glaciers, and more.

But there wasn't any living being in the vicinity…

The Demon King's Castle is…

"Oh, it's right there?!"

I was surprised when I saw it, a giant amalgamation of many buildings stuck together, houses, skyscrapers, ancient castles, fortresses, small wooden houses, all of them merged into a giant, spherical planetoid made of… rooms.

Wow, that's weird, I imagined it to look a bit different, but I suppose I was wrong about that all along.

I could sense several powerful presences, in my current state, however, they couldn't sense anything about me.

"Good, let's begin."

I flew towards the castle slowly, floating in the middle of the eternal black void, glancing at the giant building in silence, my determination wavered for a bit, but it became stronger the more I thought about this world and its people.

My new friends, Sofia, Emily, Martina, and the many other good people we met and befriended, and of the great things we enjoyed here… And of course, of this big sister, a big sister I wished I could've had in my real life, which I want to protect.

But above that, of Alma, someone I love.

Now that we've confessed our feelings, now that I've kissed her and told her I loved her, I simply cannot lose.

This world… her world, I must save it.

Or she'll die… and everything else.

Once I got close enough, I divided my phantasmal aura into dozens of tiny bug-sized clones.

Undetectable, and weak, and also invisible to the naked eye.

They floated around the castle, taking a good ten minutes because it was so damn big even when they flew super quickly.

All twelve were assembled, and through all twelve of them, I was able to channel a part of my Shadow Realm, and what was inside.

The Barrier Formation, which I've strengthened and perfected even more.

It's now or never.

I will not let you destroy this world again, and I will not let you do as you please with its people.

Nightmare Demon King, and whatever aberration is behind you.

I'm coming for you.

"{Abyssal Void Nightmare Distortion Formation}!"

FLAAASH!

Hundreds of shadow threads connected around the entire castle, in this second, everyone inside of it noticed something was outside.

But a second later, it was done.

FLUOSH!

The entire castle was sealed within a giant black bubble, space and time were distorted, making it impossible for them to teleport outside.

"It's done…"

The formation is constantly eating at my Nightmare Core stash, good thing I had hundreds of thousands of them, so it'll take a few hours before I run out and the formation disappears.

Within that time, we need to get this done with it!

I pierced the barrier, as I could get through easily without problems, rushing towards the castle, and once I was right next to its walls.

I transformed into my strongest form using the [Void-Born Outer Being Embodiment] Skill, turning into a gigantic, skinny monstrosity with tentacles for hair and a single crimson eye, with a pair of horns made of white void flames on my forehead.

"NIGHTMARE DEMON KING! I HAVE COME FOR YOUR HEAD!"

RUMBLE!

As I spoke, the entire world around me trembled, the entire castle began shaking, my giant claws digging through it.

CRAAASH!

Giant cracks spread everywhere, dimensional, void, and nightmare energies warping the space around me as they began leaking out.

This entire Nightmare Demon Castle was like a dungeon, with its own dimensional walls and everything…

As I broke into it, its internal body started collapsing, countless floors exploding and disappearing, the screams of Nightmare Demons inside echoing everywhere.

"W-WHO…?! WHO DARES?!"

The scream of a desperate, shocked man echoed from the castle, as he finally emerged, resembling a Majin from Yggdrasil in appearance with pale blue skin, long black hair, sharp red eyes, and spiraling horns over his forehead, with a crown-shaped halo made of darkness above her head.

"YOU! WHAT SORT OF NIGHTMARE…?! HOW…?! WHEN DID YOU?!"

"HEHEHEHE… YOU'RE FINALLY HERE! I AM THE HERALD OF HOPE. I SHALL DESTROY DESTINY AND GIVE THIS WORLD A NEW FUTURE! YOU NIGHTMARE DEMONS HAVE NO CHANCE TO WIN!"

"YOU DARE…?! JUST WHO ARE YOU?!"

His form began growing monstrous, and at the same time as I saw hundreds of Nightmare Demons appearing amidst the castle, I opened my Shadow Realm at that moment.

"Now go! I will take care of the King! If he's here that's for the better!" I whispered to them through telepathy as they ran inside of the collapsing, broken down castle, the disasters I brought made things easier and created a nice battlefield.

I don't think I can battle against multiple Nightmare Authorities and Realms if I fight all the kids at once, so that's why sending everyone there so they can take care of that is for the best.

Meanwhile, I'll fight the boss right away!

"DON'T YOU DARE RUIN MY PLANS! THIS WORLD SHALL BE OURS!!!"

The Nightmare Demon King transformed, or well, his aura transformed, becoming a giant made of stars, darkness, and black flames.

"AND JUST WHO THE FUCK ARE YOU?!"

As he roared, his fists rushed towards me, but I imbued my gigantic fists with Yin and Yang Essence, and my Divinities sparkled with Void and Chaos.

BAAM! BAAM! BAAM! BAAM!

I intercepted his Aura's fists, destroying his aura with each one of my attacks, pushing him back instantly, as he gritted his teeth, glaring at me hatefully.

"I am… Shub Niggurath, the Void-Born Mistress Of Tenebrous Stars. And I have come to claim this world as mine!"

Might as well play around with being an evil goddess of the void, right?

"S-Shub-Niggurath?! Such an eerie name…! Since when did our world get invaded by otherworldly beings?! No…! I mustn't let you do as you please! This world is mine!!!"

He roared back, as he began growing monstrous, fusing with his aura.

"I am the Nightmare Demon King, Solomon! I embody this world's greatest fear, Death!"

RUMBLE!

-----