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

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RUMBLE!

The Nightmare Demon Castle trembled, a giant claw made of darkness and void defied all logic, piercing through the dimensional walls forming the massive creation that only the Nightmare Demon King's almighty powers could create, and easily tearing the entire structure into two halves, followed by a downpour of deadly miasma, unlike nightmare miasma, made completely out of necrotic ooze, an alien power to this world.

SPLAAASH!

"W-What?!"

"What's going on- ACK!"

"Where is this coming from?!"

"T-The castle!"

"Demon King! Demong King!"

"We're under attack?! But by what?!"

"What could be so powerful?! We are the mightiest beings in this world!"

"N-No…! That power… it's not from our world!"

The screams of the Nightmare Demons reverberated through the entire castle, dozens of them died as the distorted dimensional walls and the void that the claw released deleted them from existence, making them melt away in agony and horror.

"Gryyyaaaarrrerggh!"

"Save usssss!"

"King! Kiinggggggg!"

"Run! RUN AWAY!"

The Nightmare Demons, who believed themselves to be the Apex Predators of this world, suddenly received a rude awakening, as something even more terrifying stepped into the place they believed to be the safest for them.

"W-What in the world is happening?! Is this your doing?! Have you betrayed us?! Don't tell me you told them about our whereabouts!"

The Nightmare Demon King furiously screamed at a woman in wheelchair while running by her side through the broken corridors and falling ceiling parts, his most beautiful creation was now falling apart horribly, the nightmare void outside beginning to enter and further distort and warp its interior. The many rooms he had created, each one containing their own pocket realms were now dying one by one, falling into the void.

"I didn't do a single thing! I promise! I thought that tomorrow everything would be over but this is…! I can't…! Is this the doing of THEM?!"

"You mean those damned bastards that keep replacing the people that disappear every loop?! Every one of them was always a weakling! How come that NOW, in the very last loop, there's strong enough ones?!"

"How can I even know that?! It has never happened before! In every loop imaginable, they always lose at the end, it is only her power that had kept this world from falling to your claws…! And this is, for sure, her last one…! And…! And…!"

The woman's eyes widened, realizing that, despite having given up hope long ago, this world, and the one she was referring to, never gave up hope.

Now, on the very last loop, someone was brought here, strong enough to defy all logic, and with the power to change destiny once and for all.

"NO! THIS IS IMPOSSIBLE! IT CAN'T BE HAPPENING! MY CASTLE! DAMMIT! DAMN IT!!!"

As the Nightmare Demon King kept running, he saw his entire castle crumbling down, more than half of it gone, and more than seventy percent of the Nightmare Demons killed.

"Everything is crumbling apart, father!" A clown girl-like Nightmare Demon rushed to his side. "If this is a joke then I'm waiting for the damn punchline!"

"What do we do now?! I am confused! Help!" A huge, fat-looking Nightmare Demon started crying like a baby. "Mommy…! Help me! Waaaahhhh!"

"This is not a joke or something, you idiots, and stop crying for mother! She's barely hanging out in her own Room Realm!" an angered, slender woman-like Nightmare Demon roared angrily, her sharp claws growing longer. "Father! This is it! We've being invaded, we must fight against these invaders and survive!"

"Y-You're all I have left?! What happened with the other three of you?!" The Nightmare Demon asked desperately.

"Didn't we tell you that they died?! D-Did you forget all of that?!" the clown girl-like Nightmare Demon asked.

"Damn it! Damn it! I forget about useless things that don't matter, I never thought we would ever need all the help we need now, you know?! Nothing like this has ever happened before! This is beyond ridiculous! This is beyond everything!!!"

The Nightmare Demon King became so furious his entire body started growing distorted, his handsome appearance becoming monstrous as he grew sharp fangs and multiple eyes through his body, while skeletal arms started sprouting from his back.

His children were terrified of his selfish attitude, as he looked at them as if he were looking at walking garbage, he quickly walked past them, looking into the nightmare void.

"Defend the castle! I'll take care of that thing on my own! Don't you dare lose against them, useless bastards! And protect your mother! She's still our last hope for this world to be conquered! Don't let them get to her!"

With a furious roar commanding his children and the last troops of Nightmare Demons that survived the entire thing, he rushed into the skies, confronting the aberration that arrived from beyond this world's boundaries.

"W-WHO…?! WHO DARES?!"

"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, HERALD OF HOPE?! WHAT?! JUST WHO ARE YOU?!"

They heard their father screaming and talking with a strange, otherworldly entity of eldritch origins, her voice piercing through all souls, sending shivers down the spines of the Nightmare Demons.

"Tch, so we are all what's left…! We must trust father in taking care of the monster," said the slender woman-like Nightmare Demon. "You lot, we've already detected that the thing brought a lot of company! That thing is likely aiming to kill us while she distracts our father! But we won't give her what she wants! We'll fight back!"

She looked and cheered at the last Nightmare Demons, roughly fifty to sixty of them scattered through the distorting, warped nightmare demon king's castle, who roared in unison, furious, scared, confused, but willing to do anything for their own dreams of taking over the world.

"Sister! They're coming! T-They're… thousands?! Tens of thousands?! How…! What is that thing?!"

The clown girl-like Nightmare Demon quickly fell into despair as she saw the incoming wave of invaders emerging amidst the endless shadows and miasma spread by the monster that attacked them.

"Tens of thousands?!"

Her big sister glanced into the distance, while their large, fat brother, continued crying while sitting on the floor, he began saying he was hungry.

RUMBLE!

Amidst the shadows and the miasma, they emerged, giant skeletons, monstrous zombies, aberrant specters, ghosts, and all other kinds of creatures and beasts.

They all had one thing in common, they were rotting and dead.

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