we open with the battle of William and clayman. clayman suddenly appeared in front of William as he slashed his swords one downwards and one sideways but William easily dodged it by dashing sideways opposite to the hand that was slashing sideways but clayman slashed sideways towards william using his axe but William suddenly dashed and appeared behind clayman with an open palmed hand, he balled the hand into a fist as strings appeared and cut of three of clayman's hand as clayman used his last hand to slash William using his sword as William blocked it using his pinky as William used his other hand to take out an orb or rather, crystal ball
Rimuru:'how did he get that?!' Rimuru checked his stomach to reveal that the crystal ball has disappeared
William:oi, clayman, do you know what this is? it's a recording medium of one of my companions sent me just now. it seems as if they found the treasure room in your castle
Clayman:wha?!- that's ridiculous! my castle? that castle is guarded by the undead. there is no easy way to sneak in.
William:those guys surrendered to our shrine maiden princess
Clayman:don't think you can fool me. if you must insist then show me evidence!
William:sure. I'll show you, how you were scheming behind the scenes, and the outcome of war.
the crystal ball began to show tear
Tear:heyyo~ clayman. I was able to persuade phobio into letting charybdis possess him as planned this is a report from tear I was able to persuade phobio into letting charybdis possess him as planned
Clayman:'this is a report from tear... made to gain leverage over frey! no way... he is telling the truth...'
Yamza:s-stop! please stop! clayman-sama!
Ramiris:that's certainly clayman's...err...middle finger something...
Dagruel:'he murdered his own followers...'
Footman:clayman's army has been routed. we have to report back to him
Clayman:'routed? footman what the hell are you saying... there's no way. don't we have an overwhelming advantege in numbers? unless there was something I didn't account for-'
William:who is "that lord?"
Clayman:grrr....AAAAAAAARRRGHHHHHHHHHHH" he slashed his sword to escape William's finger causing it to break as black glowing flames that was used against shion wrapped around William creating a cocoon "fuhfuhahahahaha... fabricating lies with those face recordings... just the kind of move I'd expect from someone who's friends with a slime. rejoice!! once that cocoon hatches you will become a puppet bound by my orders HAHAHAHAHAAHA-" William released some of his aura for a milisecond and the flames disappeared "wha-" before clayman could even react William appeared in front of him and punched his stomach "AGH!" clayman crouched his torso and held William's hand as William took it out and punched clayman's left mask as clayman was launched several meters away "this is ridiculous.. wether it's you bastard... or that oni...why doesn't it work?"
William:you're weak, that's all'
when shion was ressurected she obtained perfect memory that means she is completely unaffacted by mental attacks. as for William he's mind is so incredibly complex and so hard to even comprehend that any mental attacks will not work no matter what. you cannot manipulate the manipulator.
Clayman:no way...this isn't happening...even an ancient demon lord... it's an ultimate curse that controlled even milim!
William:well boo hoo, turns out I'm not milim

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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...