Harry POV

I let out a sigh because I was bored, I already looked around the Castle and met all the house-elves. They were strange creatures but they seemed loyal to my family and that was okay with me and they seem nice, I wished I had something to do or something to read or find a way to control my powers as I mope around something fell on my head hard and I fell over in a heap clutching my skull and rolling around. "̵o̴w̸,̵ ̷w̷h̴a̷t̸ ̴t̵h̴e̸ ̶h̵e̶l̶l̸ ̷m̶a̴n̶…̸t̶h̸a̶t̵ ̶h̷u̵r̸t̶.̵"̸ ̸ I stopped rolling around and saw a big leather-bound book on the floor next to me I cautiously picked it up and looked at the cover the Undertale Alternate universes grimoire, ̴"̷U̸n̸d̴e̸r̸t̷a̴l̴e̷ ̷A̸l̶t̴e̵r̸n̴a̵t̷e̵ ̶u̸n̴i̵v̷e̵r̸s̸e̶s̷ ̵g̷r̵i̴m̷o̷i̸r̶e̵…̷w̷h̸a̴t̷ ̵i̷s̵ ̵t̵h̶a̷t̸ ̷l̸e̸t̵'̶s̴ ̵s̷e̷e̸ ̴i̷f̴ ̶t̸h̵e̷r̷e̵ ̴i̸s̶ ̸a̶n̶y̶t̶h̴i̴n̵g̵ ̵t̷o̷ ̸d̵o̵ ̶w̵i̷t̴h̵ ̴m̸y̴ ̴n̵e̴w̷ ̴i̴d̴e̴n̴t̷i̴t̸y̷ ̴a̸s̷ ̸E̷r̸r̶o̶r̶ ̷S̵a̶n̶s̵.̵ ̵A̵h̴ ̵t̵h̴e̶r̸e̶ ̷i̴t̵ ̵i̵s̸ ̶e̶r̸r̷o̵r̵ ̷s̴a̸n̴'̵s̶ ̴e̸r̷r̶o̸r̴s̸ ̷f̸r̶o̸m̵ ̶a̵u̸ ̴c̵a̸l̸l̵e̷d̴ ̵E̴r̵r̶o̶r̴T̵a̵l̸e̶ b̵u̶t̸ ̸t̵e̸c̵h̴n̶i̷c̵a̴l̵l̵y̶ ̶h̵e̶ ̵h̴a̸s̷ ̸n̴o̷ ̸u̵n̸i̴v̷e̶r̷s̸e̸ ̴u̵n̴l̷i̷k̶e̸ ̵t̸h̶e̴ ̶r̶e̸s̵t̸ ̸o̶f̵ ̵t̷h̸e̶ ̷a̷l̵t̶e̷r̸n̷a̵t̷e̸ ̶u̶n̸i̴v̶e̸r̶s̴e̵s̵ ̶h̷e̵ ̵l̷i̸v̴e̷s̸ ̴i̵n̷ ̴a̶n̵ ̵e̵m̸p̵t̷y̶ ̷s̴p̵a̷c̷e̶ ̶c̵a̴l̸l̴e̵d̴ ̴t̶h̴e̴ ̸a̴n̷t̵i̸-̴v̷o̶i̴d̸ ̸h̸e̸ ̷h̵a̴s̸ ̸n̷o̸ ̴i̷d̴e̷a̸ ̴h̶o̷w̴ ̸h̷e̸ ̸e̴n̵d̸e̵d̷ ̸u̴p̴ ̶h̷e̸r̵e̸ ̶o̵r̶ ̶h̷o̴w̴ ̴l̷o̸n̶g̷ ̷h̸e̶'̴s̶ ̷b̶e̸e̸n̵ ̶h̸e̷r̷e̶ ̸b̷u̷t̴ ̸h̴e̸ ̶h̷a̵s̷ ̴b̵e̴e̸n̷ ̸h̷e̸r̸e̴ ̶f̶o̶r̵ ̶a̸ ̵v̴e̴r̷y̶ ̴l̴o̸n̸g̵ ̴t̵i̴m̶e̶,̵ ̵w̸i̶t̵h̴o̵u̶t̸ ̸a̶n̷y̷ ̶c̵o̶n̷t̷a̷c̴t̶ ̴f̶r̷o̵m̸ ̴l̵i̵v̸i̸n̷g̷ ̵b̴e̵i̵n̵g̴s̵ ̴E̷r̶r̸o̷r̶ ̷w̸e̴n̴t̷ ̷i̴n̴s̴a̴n̵e̶ ̵l̸o̴s̵t̸ ̸h̵i̶s̴ ̴s̵e̴n̵s̷e̴ ̶o̴f̷ ̵s̸e̴l̸f̴ ̴a̷n̵d̶ ̵b̵e̶c̴a̵m̵e̴ ̷t̵h̵i̴s̸ ̸d̸e̵s̸t̸r̵u̷c̵t̷i̷v̷e̸ ̷e̴n̷t̶i̴t̸y̶.̴ ̵E̴r̵r̸o̵r̴ ̶b̸e̵l̷i̵e̴v̶e̷s̵ ̴t̴h̸a̵t̶ ̶a̵l̸l̶ ̷t̴h̴e̷y̶ ̸u̸s̸e̷ ̶a̵r̵e̷ ̴g̶l̴i̸t̵c̶h̸e̸s̵ ̵a̸n̸d̵ ̴t̴h̴e̸n̵ ̷t̵h̴e̴y̶ ̴d̶o̶n̷'̵t̵ ̸d̷e̷s̶e̵r̷v̵e̶ ̴t̸o̷ ̵e̵x̶i̶s̷t̸,̷ ̷b̶u̴t̸ ̴o̷n̶e̵ ̴d̷a̴y̴ ̷e̸r̴r̵o̵r̴ ̶S̸a̷n̶s̸ ̴d̵i̷s̴a̴p̶p̴e̵a̷r̵e̶d̶ ̸w̴i̷t̵h̵o̷u̴t̷ ̷a̴ ̷T̷r̷a̴c̵e̶.̷"̷ ̶

After discovering my new identity, I am this destructive entity that destroys others Au's within the Multiverse, but I do not want to do that it also says I could even travel to different multiverses I was excited about using my powers to travel to different multiverses where I could have like a fresh start and make a name not just as Error the destroyer or boy or freak, I slowly drew my attention back into the grimoire that's when I notice a difference Au's has been suffering more than I have maybe I could help them. But how? I thought to myself could they already met the former Destroyer, as I continue looking within the pages of the grimoire to my delight know they have not met me you seem like the previous Destroyer was erased from existence within their memories. This could work I thought excitedly as I slowly stood up and put my hands on either side of each other and slowly begin to pull open a portal to the anti-void, once fully open I carefully stepping into the anti-void. What shocked me was to find a white void, S̴o̵ ̴t̶h̴i̷s̸ ̵i̶s̴ ̸t̸h̶e̸ ̵a̴n̶t̵i̵-̷v̴o̷i̴d̵.̴.̶.̴ ̷i̵t̵'̸s̸ ̸s̴o̴ ̴e̵m̷p̸t̵y̸.̴"̷ ̴ I let out a sigh as I started my training as I slowly manage to use my magic to recreate my blue strings the ones I used to kill the Dursley with, I also discovered I could change the color to my strings not just blue. That was not all I learn can now open windows to different Aus watching now and learning from them. It helps to pass the time in the white empty void.

I don't know if the concept of time is reasonable in through the anti-void it feels like I've been here for days but when I open a window to my original universe I could see the time always been like maybe 2 or 3 minutes, This kind of terrifies me 'if I'm not careful within the anti-void I could lose my mind' I thought to myself. As I sat on the floor of the anti-void thinking and watch the different au's from the multiverses they all look the same different copies of the original Sans the skeleton, but that's when I notice there is more than one copy of the same Au it's throwing the balance off. I sensed it sooner or later I might have to leave the anti-void but before I do that I stood up from the floor and let my magic flow creating a door to Potter Castle for anyone who wishes to leave the anti-void to see the surface for the first time in their lives and experience everything on top of the surface has to offer within the safety of the wards of Potter Castle.

That's not at all what I did I created strong enchantments to hide the anti-void from a certain nosy skeleton who calls himself a protector of the Multiverse, I was a little winded for using too much magic it took me a while to steady myself and regain my magic. Once I compose myself I tested the enchantments feel how strong they are. To my satisfaction, they were in-par of the wards of Potter Castle, I was very nervous it was time for me to leave the anti void and meet new people that I may have to help or kill.

3rd pov

Harry double-check everything was ready including safe zones that he made not to long just in case. Then out of nowhere, Harry felt a sharp pain hit his soul that is located safely within his rib cage. At that moment he knew ink was making another Au again, Harry knew that is not enough to tip the balance over yet he just hops this gives him enough time to talk to the people of the AUs to relocate them safely and Destroy AU itself. Harry open a random portal but before he took a step He just remembered, that he still has the enchanted Goblin bracelet on he took it off and send it back to the Potter Castle he didn't want to lose it, once he stepped through the portal he's no longer Harry James Potter but he becomes Error the Destroyer.

Error landed in Dusttale Snowdin looking around the place Error noticed a large amount of dust everywhere as he walked closer to the dust he kneeled and study it, right away he notices that this was not ordinary dust it was monster dust and it was everywhere. Not sure what to make of it he pulls out the Undertale Alternate universes grimoire quickly flipping through the pages something with dust in it and found it with the large bold letters got his attention he was in Dusttale. After glancing through the pages of the grimoire he has a vague idea of the story behind this Au but Error knows better, it was the human's fault Error didn't understand why the first human to fall into the underground started killing the monsters instead of freeing them.

That something he'll never understand but his job is to get rid of the little monstrosity's once and for all, Error started looking around trying to find the little nuisance until he picked up the sound of fighting and teleported towards it. Once reaching there he sees two figures a child and a skeleton who seems about to fight each other to the death. Moving quickly Error pull out his strings wrap them around the kid's soul holding them in the air.

"AlRighT kId I tHink YoU hAve dOne eNoUgh." as a large amount of killing intent flooded the area paralyzing the kid and the other skeleton, as they slowly look to see another skeleton monster but this one was different as blue neon strings connected to his fingers and many error signs appeared around him. This didn't deter the kid for long and allowed the kid to get enough courage to speak up again, "What the hell let me go! You freak! I will kill you!" After hearing that word freak made Error killing intent intense three times more making his strings tightening around the soul of the kid to the point it was painful. The sans of this Au was surprised when a black glitchy skeleton with Error signs wearing black slippers and wears a black coat with a blue hood with black sweatpants that have a vertical blue stripe on each leg, attacks the kid. Then his eye sockets widened the dark glitchy skeleton started to pull his strings making Chara and Frisk split apart from each other.

At that split-second, Error sent an innocent Soul once as he split the Souls apart, Error let the innocent Soul known as chara go which surprise them as both skeletons and ghosts skeleton, and ghost child watch Error as the killing intent increased to the point where everyone can't even move and it has gotten darker.

(A/N I'm not good on describing how fights are but you should know this video if you can't look it up on YouTube it's Sans stronger than watch it you for you guys to the idea to see how I want the fight to go out just switch out Sans with error Sans and all that)

"listen here kid,

I know you like,

To hack the game and the code,

and mess with the files

but let me make your fear chime,

Because friend I don't

play by those lines

Kids like you can't play by the rules,

and things like me aren't afraid of

bein L

So let's go let your heart grow blacker,

let's go, dirty hacker...

Go ahead and try to hit me if your able,

Feel you're soul get covered by

my cables

Do you think your the one in control?

Did you think about the lives

that you stole?

Youre never going to escape,

you'll be trapped forever!

In my room of puppets and levers

I won't let you run,

I won't let you [RESET],

I will make you good on all my threats

I forgot-

What it's like to love..(x3)

What it's like to love..(x3)

I won't give you a chance,

I won't give you mercy,

If you want to get past me,

Well too bad, so sorry

Then again no matter how strong,

I think I am or act

I can't stop all the sounds,

of the screams screaming back...

Go ahead and try to hit me if your able,

Feel your soul get covered by

my cables

Why are you asking about my friends?

It's making me MAD

The Errors and glitches make it

hard to see,

But I know I need to keep going...

I'll kill the AU's,

I'll kill the glitches,

I'll stop anomalies...

I forgot-

What it's like to love..(x3)

But I don't need to know…" And just like that, Error brought out of bone stabbing Frisk killing them right before their soul could shatter and do a reset again Error used to strings to catch it. The three bystanders were shocked by what just happen the black skeleton had just killed that demon child. It was over the nightmare was, finally over but what now everyone they know was dusted in the underground. Error walks over to the three stopping right in front of them. They could tell the black skeleton was nervous as he looked at the ground. h̶e̸l̴l̴o̸,̷ ̴m̷y̴ ̷n̶a̶m̶e̷ ̸i̷s̵ ̵E̶r̴r̸o̸r̶ ̵a̴n̶d̷ ̸I̷'̵m̷ ̸t̵h̴e̵ ̷g̶o̴d̶ ̷o̷f̵ ̶d̴e̸s̷t̶r̴u̸c̶t̵i̴o̵n̶.̸ ̸I̶t̶'̷s̷ ̶m̵y̸ ̵j̷o̶b̵ ̸t̵o̴ ̷d̸e̵s̶t̵r̸o̸y̶ ̷ ̴A̵U̸s̷ ̴t̷o̴ ̷k̶e̵e̶p̵ ̶t̷h̶e̵ ̶b̵a̵l̴a̸n̶c̴e̷.̷ ̴M̸a̴y̵ ̵I̷ ̵a̴s̴k̴ ̴y̷o̴u̶ ̷t̸h̵r̸e̷e̵ ̶t̸o̶ ̴c̷o̶m̵e̶ ̵w̸i̷t̶h̵ ̸m̴e̵ ̷t̸o̶ ̵a̷n̷t̵i̶-̶v̶o̸i̴d̸ ̶s̵o̵ ̵I̴ ̸c̶a̴n̵ ̵d̶e̸s̸t̸r̷o̸y̶ ̷t̷h̸i̶s̴ ̴A̵u̷?̸ ̶I̸ ̶w̸o̸u̷l̸d̵ ̵e̴x̶p̵l̶a̴i̸n̸ ̵e̴v̴e̶r̵y̴t̸h̷i̷n̴g̴ ̸o̴n̶c̵e̵ ̵I̸'̵m̸ ̸d̸o̵n̵e̴ ̶w̸i̴t̸h̸ ̷m̶y̶ ̵j̴o̴b̷.̴

The three don't mind going with Error after what he just did for them they didn't care for their Au getting destroy there was nothing left for them there. They agree to go with Error to the anti void, Error opens a portal to the anti void and wait for them to go through once everyone made it across, he closes the portal right behind them as Error turns around opening the code and finding the right one that will destroy the Au itself completely. As Error destroy the code he stood back and watch the destruction as the Au destroyed itself until the was nothing left Error, reopen the portal to the anti void before the others could see him, quickly he walked to another door that specifically opens only to him.

Error opens the door and leaving the frisk soul with his puppets, and quickly closing the door and locking it he made his way to the others and explain the situation that the anti void is the safest place if they need anything all they need to do is go through the door that will lead them to the surface upon Potter castle and if they need food or anything all they do is asking house yet house elf. Error also warned them about leaving the perimeter of Potter Castle, the wards would push them back and they will land on their bum it was for their protection because many dangers lay beyond the castle Ward's. He waved goodbye to the three as he opens another portal and continued his job as that led him to another random copy now this one probably, Au makes him cry he has to try not to hug the sans and papyrus of this Au. No matter how much he wants too it doesn't help that he could relate to them they were in worse shape than he was.