An idea was forming in his mind, but he would have to test something first. "do you know how to use a gun?" he stiffened slightly, then ignored him. Too many questions. He opened the loading mechanism and squinted a little. "hmm" the divot had exactly enough space for the BB, nothing else. Which means you can't just put real bullets in it. Then he built a little on his idea. Killua grabbed one of the pellets and tried to crush it, "w-wait! We have no way to know what's inside that" Nagisa said, putting a hand on his shoulder. What could it possibly do? But it was surprisingly tough. Just like... my superalloy metal. But it's not heavy or dangerous to normal people... he loaded a shot and pressed it to his arm, then fired. The popping noise was kind of realistic, but he only got a sting in his arm. "u-um..." he blinked over at Nagisa. "you can leave if you want" he looked conflicted so Killua decided to give him a little push. "fuck off blueberry" he nodded, then left quickly. Killua pulled out his own knife after activating En to see that nobody was around, then reinforced it with Nen.

After he did that he brought a small metal bowl out of his bag, he always had one on him just in case. After placing the BB in the bowl, he brought the tip of his knife down on it slowly, using shu. As he did that, he kept his eyes on the substance that was going to come out. I'm pretty sure there's some sort of powder inside, or at least a liquid. Something that had always fascinated him was chemistry for some reason, it kind of went with poisons. When he pressed down, his knife slid in a little but was halted very quickly. After that point it slowly cut through, almost like trying to pull something out of thick molasses. Not that he'd ever done that before, it was merely a metaphor. He heard a hissing sound and quickly chopped the rest, then held his knife above the bowl and examined it. Was that some sort of chemical reaction? Where the hell did the hissing sound come from? Because the knife was unmarred. He peered down into the bowl and saw a green substance in the bottom. By the look of it, it took up about 5 percent of the BB. I wonder if the hardened form of this substance is what the knives are made of.

Though his En, he sensed someone approaching. Fuck! Killua quickly put a lid on the bowl, then slipped his knife away and put the secured and lidded bowl in his bag. Afterwards he pretended to be flexing and examining a green knife. "white haired new kid?" he glanced behind him to see someone with dark blue ish hair, he was the kid with Nagisa before school that one day. How does he not know my name? Octobitch Sensei says it all the damn time! "need something?" he gulped, "uh... I just came for some of the BBs..." that was when he noticed who baseballs in his hands. One was embedded with BBs, the other wasn't. he's making a second one? Interesting. Killua scooped a hand into the BB barrel, and walked over. The guy looked really nervous to be honest, so he gently took the ball and began to copy what he had done to the other. Killua made sure to put them deeper in to increase aerodynamics of course, but the kid looked confused. "making it more aerodynamic than the other one, hope this helps"

He gave him a nervous smile, "t-thanks man! Uh... my name's Sugino " he shrugged, handing him his new and improved baseball. "Killua" he heard a slithering noise and leapt out the window, which was conveniently open. "you know what time it is Killua, come back here!" he activated Zetsu and bolted for his tree house, the Octopus hadn't yet found where he lived. And I may have implied that I rented an apartment. So he leapt into his tree house, then quickly took out his knives, BB bag, and bowl. He opened said bowl and blinked in surprise when he saw that the entire BB had melted into the other substance, causing it to turn a blue color. The fuck? Killua was intrigued. Not only was the octopus strange in every way, the thing designed to kill him also was. He came to the conclusion that there was some sort of material separating the liquid from the BB, when he exposed it to the rest of the BB it must have kicked in. sure enough, when he poked his knife around it snagged on something.

Killua brought it up, only to see a small clear film. This time there was no hissing sound. I wonder if I could thread the material through my clothes, or curtains. Then even if he does find me, he can't do anything about it. As a Transmuter he could alter the properties of certain substances, honestly he had been practicing for stuff like fashion because he liked it. Sometimes he found a color he really liked and just wanted to wear it, so he figured out how to turn many materials into a threadlike texture. It didn't work on everything, so he might be out of luck. But I'll try it, hopefully nobody notices so much anti Octobitch shit taken from the room though. That was when he got an idea. It was a dumb idea, but if he just asked then it might work. Killua left the substance in the sunlight, wanting to see how it would harden. Then he ran back up to the school and sure enough, the Octopus was darting around the classroom. "hey Korosensei"

He suddenly bolted over to him and started feeling him down with his tentacles. "where were you! Class ended twenty minutes ago! Your late! Ho-" he cut him off by opening his notebook and sitting down at his desk. Does he really care about my education that much? Killua sighed, "I have a deal" the octopus paused. "deal?" he smirked a little. "I'll sit here for an entire extra 30 minutes without any candy, if you give me one of your tentacles" there was silence for a few seconds. "may I know why?" he grinned, "experiment~" Kurosensei's head turned yellow with green stripes. He's being cocky, bingo. "why sure, you can even have two if you stay for an extra hour!" two hours in this room in exchange for two tentacles. Imagine what I could do with those? And I could also see the backlashes on his body because of it! "Deal"

This is the worst deal I've ever made. He was exhausted by the time extra lessons were over, why the hell are their so many kanji? But then, he slid out his knife as he closed the book. "wait a moment, I think I'm gonna-" Killua chuckled, "are you scared I'm gonna kill you right here?" he shook his head, "not one bit" Killua smirked, then slashed his knife through a tentacle as deep as he could. About a half meter came off, then he grabbed one of the green knives. When he did that, he cut another. Killua watched curiously as the one with his own knife wiggled more. "interesting" Kurosensei took a few steps away. "that knife of yours is actually painful" can he not feel pain or something? Or is it just that it's more painful than the other one? He picked up his knives and the tentacles, then watched him move. It slows him down, interesting. He gave Kurosensei a wink as he slipped out the door. "Adiós!" as soon as he was out of sight, he bolted for his tree house. When he got back to his tree house he noticed that the blue substance had in fact hardened. It also had a sparkly sort of sheen to it.

That color's pretty, maybe I'll make more and mold it into something. He poked at it with the tentacle and it started to disintegrate. He grinned, but when he went to touch it he had to gasp and snatch his hand back as his eyes widened at the burn mark on his fingers. That's why it's inside, these are supposed to be safe for students to use. Killua used Ko and reached down to touch it, he felt a little heat but he wasn't burned. After that he grabbed a spare log and shredded it into a small thin pole, then pressed them together. Nothing happened, which he was grateful for. If this thing could burn down my treehouse, I'd have to leave it where other people could find it. He cut open another BB and placed it in the bowl, then put part of one of the tentacles to the green substance. It's...melting? Killua used Ko and put a finger to the substance, only to feel a freezing chill. This is so fucking cool!

"so the green is cold, and the blue is hot. The BBs must neutralize the temperatures somehow" he muttered, before touching just the BB shell into the tentacle. He blinked. Nothing happened? Then he pressed it harder and the material cut through. The pieces suddenly clicked into place. The pink can go through the material without disintegrating, the green is the stuff that actually destroys the anti-matter. Killua pressed the knife to the green and he heard the hissing noise, then saw that the substance was bubbling. Fuck, I should have worn a different outfit. Or at least had safety goggles. Then he brought a finger with Ko on it to the liquid and felt that the substance was now sticking to itself and a little squishy. As he brought the knife back away it still had the same texture. What happens if I eat it? Killua elected not to find out. Maybe he would feed it to an animal first, just to see what happened. He decided to deactivate Ko on his pinky finger and poke at it with that. Nothing happened? He poked it again, this time harder and it felt like putty. But does it still hurt him?

He pressed the tentacle to it and to his delight, it started melting. The first tentacle was pretty much ruined, so he prodded it with his knife to see what would happen. It started to break apart and shit so he threw it out one of the windows as he cut it a few more times. It dropped into a bush and went out of sight, at which point he turned back to his bowl and cut another BB. This time he poked his pinky finger into the unaltered substance and quickly grabbed his hand back. When he glanced down the tip was blackened slightly. It's also kind of numb. Almost like frostbite. When the blue burned him, the green froze him. What Killua had noticed the most though, was that the blue was the most effective at destroying the cells. It also happened to be the most dangerous though, the fingers where he had touched it hurt like hell. What do I say if someone asks me about it? Then he checked his phone, and it was 8:00. well shit. So he cleaned up his experiments and placed his putty somewhere safe, as well as the blue stone. He also hid all his weapons in case his teacher somehow found him. After that he slipped into his hammock and drifted off to sleep.

1933 words

To be continued...