it seems like I need to tell you in the past chapters that when I mean william is merciless in his past I mean like this.
(canon) *gore warning*
Error 404 was sitting on his throne as suddenly "heroes" came in they were supposedly the most powerful heroes ever "what business do you have today? it must've been very important to ignore the warning of my servants" one of the heroes responded "hah, they were foolish to just let us come to you" Error 404 replied "well it's so that I can see if your worthy to even fight me, but I want to see you two fight since I was a bit bored" suddenly tentacles of pure darkness tried to attack him but he just pulled one of them then turned them to solid then stabbed the user who summoned them, he then punched his fist through his body then through his head then use his body as meat shield as one of the heroes used fire of life burning the hero meat shield he then moved at lightspeed and grabbed hero who used the fire by the legs and threw him around like a nunchuk decapitating one of them he and taking off one of their hands Error 404 then slammed the hero he was holding and stamped on his head "you bastard!!!" he used the sword of utmost destruction to hurt Error 404 but it just broke "impossib-" Error 404 back handed the hero decapitating him one of the heroes tried to punch him but he just took the arm of the hero and punch the head of the hero punching through his head one of them remained the scaredy-cat one "you must be the only one left" the last one used his most powerful spell in the multiverse called End of Reality but Error just snapped his fingers making it disappear, as he was about to kill him, he stopped and took his necklace "wait! sto-" he was tied up with strings and he put a gaster hand on his mouth Error 404 opened the necklace as it showed the family of everyone every hero that he fought "maybe I'd pay them a visit" the last hero had a terrified look on his face as he took off the gaster hand "DON'T YOU DA-" error 404 took off his jaw as he winced in pain he then grabbed his head and said "that won't even compare to what I'm about to do to you" he walked out the door with still having the hero in his hand "Clean up" he said to the servants as they walked inside Error 404 then disappeared in the speed of light and reappeared in a peaceful village, he looked at the hero to see the hero crying and shaking his head (no) Error404 then used his body as a weapon to kill the civilians since he was too lazy to look for the family, as he was doing this the hero was crying harder and harder as it was all over leaving nothing but a shattered sky and bloodied village Error404 had enough and let the hero (who was still crying) go Error404 then decapitated the hero and took the code of of the Alternate Universe and he disappeared

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that time i got transferred in another omniverse
FanfictionWilliam was battling a certain someone and as they used their strongest attack destroying the omniverse william awoke in a cave as he looks around then he meets a friendly slime read as they become friends or maybe even something more~ (this book i...