"You know I didn't know what to expect when I came across your demons and learn about their master, I thought I would be fighting some terrifying monstrosity that would put up a decent fight, now I just see a weak man who became a monster to escape death, who is so fearful of death you made 23 brains across your entire body along with 16 sets of hearts just so you wouldn't be so easily killed." I couldn't help but mock Muzan while I spun my staff to deflect the many spiked flesh whips he sent my way.
It's sad really, I knew this world on the grand scale of things was on the lower end when it came to the enemies level of strength but this is rather sad that I'm too strong for this place that I wasn't enjoying myself in this fight, it felt more like a chore than anything.
Though as i said that and was in my thoughts for my boredom Muzan couldn't help but clench his teeth in anger, he couldn't see my face or even my eyes properly but from the inflection of my voice and how my movements seemed more automatic and with just enough strength to deflect him, he could tell he was both being looked down upon and underestimated by this thing in front of him.
"Whoa, trying to sneakily attack me from beneath the ground? You know nothing you can do will even hit me right?" I was personally not giving him the satisfaction of landing one hit on me while my staff rapidly stroked at the areas where his brains and hearts were located.
This would constantly make him cough up blood and clearly leave him in pain for the lost of those organs as they were crushed by my attacks only to not regenerate quickly due to interference from my Anti-Spiral powers confusing his bodies natural ability at regeneration.
"What the hell even are you?! What makes you want to come into my castle and bring those pests here?! Not only that but even steal from me one of my own subordinates!" He shouted out at me while he kept rapidly attacking me while I just kept smashing his attacks away.
"I'm simply cleaning MY Homeland of the Vermin that infest it, and you are the source of all these Vermin and must be removed to clean this country of your filth, you've lived long past the day you should have died all in a hope to gain true immorality by getting those Blue Spider Lillies you so desperately need…" I say this all while I purposely go faster than he can keep up with my staff strikes of my Black Iron Staff, hitting his vitals and making his regeneration take longer than before as I thrust my staff straight through his last heart and impale him on the wall as he struggles to remove it.
"It's no use, I can dictate how heavy that staff is, and I don't see you being able to ever lift 16,000 ton's even if you had all your strength." After all the staff itself is based upon the Ryu Jingu Bang that the Monkey King, Sun Wukong, used and while not the real one it can match its weight and extend its length if needed.
Since I was getting into character and I didn't care about wasting the overwhelming amount of SP I had on me, I spent over a half a billion SP of my rather large SP reserves to buy what is known as 'The Immortal Blessing Gourd', which when drinking from it with whatever is inside will help heal and repair wounds at half the normal strength the healing you could recover from it but increase your physical stats by 10x the amount for a short time.
I also splurged a bit by filling it with Immortal Peach Wine, a drink that the monkey king himself seemed to enjoy, so I took a sip and I enjoyed the cool soothing feeling it gave me and my entire body, while my power skyrocketed in return.
"Hooo, now that's a powerful drink, though I'd love to have the pleasure of killing you myself, that's not my job, all I'm here for is to set the stage." I say to the pathetic piece of shit before I pulled out my staff before instantly thrusting it forward 38 times in less than a fraction of a second.
This smashed him with such force that he broke out of the room and tumbled away before thrusting his fingers deep into the floor to stop his momentum.
He was breathing heavily while coughing up massive amounts of blood, 'How? How can this be happening?! Never in my entire life have I been toyed with such a way, not even against that man was I put in such a precarious situation as this!' He could help but shout internally before looking up at the being with hate filled eyes.
Soon enough the sound of a Shamisen could be heard as the rooms began to more and change as well with the headless corpse of Nakime was slumped over as her body was slowly turning to dust as he looked to see the headless musician still playing his instrument.
*******
In the shadows where whispers weave,
The Demon King, on this night does grieve.
His throne of darkness, cold as stone,
Yet deep in his heart, a seed is sown.
As midnight strikes, his power reigns,
With thunder's roar, he binds the chains.
But through the gloom, a glimmer breaks,
A new day dawns, the earth awakes.
The sun ascends, igniting sky,
While hope unfurls, like wings to fly.
With every ray, the shadows fade,
The Demon King, in fear, dismayed.
For light descends with fierce intent,
The hourglass turns, a message sent.
No darkness lasts when stars align,
Even Demons know, the dawn is kind.
So rise, dear world, let courage swell,
For every night must bid farewell.
With each new dawn, the tales we weave,
The Demon King is forced to leave.
*******
This song was sung and played by the headless musician while one after another door would appear as the Demon Slayers walked out from within while cleaning of there weapons from blood.
Then I appeared and landed next to Shie as we both held our staffs over our shoulders as we wrapped our arms around them before jumping up and standing next to Akaza and Changling in his Headless Muscian form.
"The final battle is for you Demon Slayers, and don't worry, I've gone out of my way to destroy all the hearts and brains within his body, remove his head and end this nightmare for good!" I say to them as they all grip their blades tightly while all of their demon slayer marks appeared around them along with their aura and spiral power flowing across their body.
Seeing this Muzan could only clench his teeth as he pulled himself up, "I REFUSE TO BE KILLED BY PATHETIC HUMANS LIKE YOU!!!!" He couldn't help but shout in a rage before attacking them all simultaneously at the same time.
But unlike their cannon counterparts, none of them were injured, killed or forced to retire due to various reasons along with them all being able to see the hidden world they could all dodge his frantic attacks as thier blades coalesced with power.
Earlier, before entering the Castle.
"Oh and here, this will be a one time breathing technique all of you should use together when you finally battle Muzan, this will be key to allowing to sever his head for good." I said before imprinting this one time technique into their minds.
Focusing all of their combined spiral energy together they surrounded Muzan as they readied their blades for their most power final attack.
"SPIRAL TECHNIQUE! GOD SHATTERING STAR!" They shouted in unison before all of their attacks came at him in all directions at once as all his eyes could do were widen in horror.
"N-NO! THIS IS IMPOSSIBLE!!!" He shouted out trying to protect his body with everything he had as he felt the power of life and more importantly the sun burning into his flesh.
"AAAAAAAAAAAGGGGGGGGGGGHHHHHHAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHH!!!!!!" He screamed in pain and agony as the powerful attack set his body ablaze like a burning inferno before sending him outside of the castle and straight under the true sunlight.
With spiral powers ravaging his body and under the true sun, his skin charred black as his body and bones began to decay rapidly before he could only give one last terrible scream as his body turned to ash and leaving nothing busy dust behind.
Across Japan all demons screamed out in agony as they began to turn to nothing but dust with a few genuinely smiling as they were finally free of the curse of being a demon for good and knew Muzan was gone forever.
And on this day Japan was finally free of the Demons once and for all, dawning a new era where demons no longer threatened the populace anymore.
And soon enough with a few more things to do it will be time to go back home once more.
******
When he gets back home I'm going to being the start of Volume 3 for this and for the next (hopefully) 40+ chaps will be in the main world, excluding a chapter or two for the other worlds he has to see people from those world.