Find his notes.

"...okay? Maybe he's undead?" Kazuma suggested, still wary.

"Nope, nada," Aqua shook her head after approaching the body and examining it. "He's long gone. No lingering regrets even."

"That's... Surprising... He clearly died alone..." Kazuma grunted. "...now what do we do? Without him around, how can we shut the machine down?"

He then paused and looked at Wiz, who shook her head, and whispered, "I don't want to reveal I'm a lich, and even if I was willing, I can't reanimate one who died without regrets so long ago..."

"Damn," Kazuma cursed quietly.

"Wait, what's this?" Aqua asked, finding a book in the body's robes. "...it looks like his notes, maybe we can find something!"

Kazuma quickly moved to take the book and flipped frantically through it, skimming until he found the earliest entry referring to the Destroyer. He then read with a few others doing the same over his shoulder. Apparently, Noise's Head Researcher had not been amused with his nation's demands for him to build a massive mobile weapon to use against the Devil King. Not least of which because they were evidently cheapskates, and gave him a budget that made the task pretty much impossible.

He had tried to get out of it by acting crazy, going around in his underwear, but that... Well, it didn't work. Kazuma actually snorted at that part. This world was already full of crazy people, did this guy actually expect that to work? When the blueprints were due, the researcher had nothing, and had already drunken away the advance payment... Then he smashed a spider on the blueprint paper, and decided, "Fuck it, I'll just turn that in!"

Surprisingly, the blueprints had been well received, which explained why the Destroyer looked like a spider. Of course, the researcher still clearly didn't have much clue what to do, and as the machine was being built, and he was under pressure to find a power source, he had decided to go with something he thought they would never be able to get their hands on, a super rare stone called Coronanite... Unfortunately, the adventurers of Noise must have been pretty damn competent, because they actually got the damn stone. Which left the researcher stuck hoping the thing actually worked in powering the machine.

Long story short, he drank all of his alcohol one night, and then drunkenly put his cigarette against the Coronanite in the reactor... Which set it off, powered the machine up... And it proceeded to rampage. Stuck on the machine as it destroyed Noise, the researcher actually felt satisfied due to having been fed up with being made to make machines that caused more problems than they solved, and at the very least, it was over.

Though he was unable to get off the machine anyway, so resigned himself to waiting for death on it. Albeit, he was cursing the idiot who made the damn thing... Before remembering... HE was said idiot!

"...you have GOT to be shitting me... Our problems right now were caused by this total NINCOMPOOP!?" Kazuma shouted, slamming the book shut and pocketing it.

"What do we do now!?" Fio asked. "The Destroyer is gonna blow soon!"

Kazuma grumbled, thinking back on what he had just read, trying to think of something, ANYTHING to do!