Sci-Twi, Chrome, and Senku were all prepped to go cave exploring. 

Chrome: SENKU! SCI-TWI! You two are better at science than I am! But I'm ten billion times the explorer you'll ever be! 

Sci-Twi: That's because you've had experience. 

Chrome: Well, listen up! What can Dig Team Captain Chrome get for you? I bet there's some ingredient of the cell phone plan that we're missing, right? 

Senku: Oh, nothing's missing. 

Chrome: HUH?! NOTHING?! 

Sci-Twi: We basically got everything we need. 

Kohaku: So, is there even a need to go exploring? 

(Y/N): They just want to go and have fun. 

Senku: Heh, I wouldn't say no to more copper. Because our next tough crafting project is sure to use it. 

Chrome: I'M ON IT! 

Yang: Hey, don't forget, New Year's coming! 

Kaseki: Hmph, I've got half a mind to finish whatever it is and give Chrome a thrill when he gets back. 

Sci-Twi: We're making vacuum tubes, the precursor to computers. 

With that, they started getting to work. 

Gen: Hmmm ... vacuum tubes? Finally, something I haven't a clue about. 

Ruby: But you have heard of them, right? 

Gen: Yes, but I'd be hard-pressed to explain what they are. 

Senku: Heat makes electrons all excited, so this thing gets them flowing in the same direction. 

Sci-Twi: They're the gears for the electronic age, and a core component for cell phones. 

Kaseki: Can't say that was a cinch, but it wasn't different from making light bulbs. 

They had one vacuum tube prepared, but as they put it to the test, it cracked! 

(Y/N): AGH! 

Suika: It's starting at the base! 

Senku: The wire expanded. 

Sci-Twi: Dang, we poked that metal wire through the glass, but the heat from the burning phosphorus made it expand. Only by a few microns, but it was still too much for the glass. 

Gen: WE'RE TALKING MICROSCOPIC LEVELS HERE?! WHAT DO WE DO?! 

Sci-Twi: We work harder! 

https://youtu.be/yydNF8tuVmU

And so, Senku, Sci-Twi, and Kaseki went to work to improve the vacuum tube. 

All three of them were hard at work, until- 

Chrome: GUESS WHO'S BACK! 

Sci-Twi: CHROME! 

Senku: Perfect timing. 

They used a copper tubing! 

Gen: Uh ... what is this going to do? 

Senku: The advantage of tubes is that they expand inward. 

Sci-Twi: Yes, the surrounding glass won't crack with it. 

But suddenly the bamboo filament burned as they tried it. 

(Y/N): Shit, that didn't work. 

And so... 

The scientists kept working harder and harder, but it was no use. 

Senku: Damn it! Bamboo filaments just ain't good enough for tubes! 

Sci-Twi: There's got to be something we can use! 

(Y/N): Yeah, there's got to be some fancy material that we can use! 

On New Years ... 

(Y/N): Have a good look, everyone, we're going to watch the first sunrise. 

Everyone was about to watch the dawn rise. 

Sika was holding onto a blue jewel as it shined because of the light! 

Everyone: OOOOH! 

Sci-Twi: Wait ... Senku ... that's- 

Senku: Scheelite! 

(Y/N): What's that? 

Sci-Twi: An ore that twinkles blue under black light. 

Senku: it's an ultrarare ore. We can use that to make modern-day filaments! 

Sci-Twi: Element No. 74, Tungesten! OF COURSE! 

The three got ready to head cave exploring! 

(Y/N): Okay, we need someone who can help them out. 

Ruby: Why don't you go (Y/N)? 

(Y/N): Because I need to help train all the warriors to be ready. 

Ginro: I'm not going! Caves are scary! 

Yang: WIMP! 

Kohaku: (Y/N) is right. 

Blake: We need someone really strong. 

Yang: And tough. 

You all turned to Magma. 

Magma: WHAT?! 

(Y/N): Magma, you're going with Senku, Sci-Twi, and Chrome. 

Magma: I didn't consent to this! 

(Y/N): Come on Magma. 

Magma: STOP! 

Blake: Magma. 

Magma: I SAID NO! 

(Y/N): Magma, as your Chief, I order you to- 

Magma: And I say no! 

(Y/N): DO IT OR I'LL BEAT YOU WITHIN AN INCH OF YOUR LIFE! 

Magma shuddered in fear. 

Kokuyo: And that is why you never make (Y/N) angry. 

Jasper: He's one of the few who can shut Magma up. 

And so... 

The four of them set foot into the caves, with headlights and everything! 

Chrome: Hey, was it really a good idea to bring Magma along? I mean, he wanted to be King of our little world. If he got the chance, he'd love nothing more than to bring us down here. 

Senku: We're in a bind. We seriously need Tungsten since it's so strong and heat-resistant. 

Sci-Twi: And since (Y/N) became the leader, Magma's been behaving himself. Besides, you're the one who beat him, Chrome. 

They continued their exploration, going over long chasms and everything. 

Eventually, Senku noticed that one of the rocks on the ground was coming apart. 

Senku: WAIT! Mica. 

He took off some rock. 

Sci-Twi: Like a layered cake. These fragile layers are peeling off, and creating natural pitfalls. 

Chrome: Baad! Mother nature sure cooks up some nasty traps for us. 

Magma: AAAAAAAAAAAAAAAAAAAAAAAAAAGH! 

Magma was falling down one! 

Sci-Twi and Senku: MAGMA! 

The two grabbed his hands! 

Chrome: WHAT ARE YOU DOING?! 

Sci-Twi: PULLING HIM UP! 

Magma: JUST FORGET IT! THERE IS NO PLACE FOR ME HERE! I TRIED PLAYING NICE! I TRIED! BUT I DON'T BELONG HERE! 

Sci-Twi: What are you saying?! 

Magma: This era, it just doesn't ... it's too crazy with all this science and everything! I don't fit in a world like this! 

Sci-Twi: YOU COULD KEEP TRYING! THERE IS A PLACE FOR EVERYONE! I- 

Suddenly, the ground gave away as Senku, Sci-Twi and Magma fell down! 

Chrome: NOOOOOOOOOOOOOOOOOOOOO! 

Sci-Twi: Well, we're stuck here. 

Magma: Forget it. There's no point. 

Senku: Hang on, there's always a way. 

The two were thinking as hard as they could. 

Magma: STOP PACING! IT'S ANNOYING! 

Sci-Twi: I would appreciate it if you didn't scream. You coudl cause a cave-in. 

Chrome was dripping water on Magma! 

Magma: CHROME! IF I MAKE IT THROUGH THIS, I'LL KILL YOU FOR THAT!! 

Chrome: Oh, stop it. I'm doing this so that the pit will fill up and you can swim out. 

Magma: That's not going to work! 

Chrome: Determination's all about making it happen one step at a time. 

Sci-Twi: Not if you run out. I'm with Magma on this one. 

Senku: Now wait a minute, that's not a bad idea. 

Senku brainstormed and- 

Senku: CHROME! You gotta construct what I tell you up there! 

Chrome: OKAY! 

Magma through the supplies up to Chrome as he beagn to get to work. 

Sci-Twi: Magma, you're just as important as all of us. In a scientific cilivzation ther eare roles for us, and for people like you. 

Senku: It's not about who's the boss or the top tog. WE embraced our diversity because that's our true strength! 

Magma: That's not the problem. The fact is, I had a high place before all of you came in. (Y/N) ... he took the role of Chief from me. 

Senku: But, now you'll see what you never thought to see. 

Magma looked up as he saw a bunch of water coming down! 

Chrome had used a bunch of hoses to cause the water to go up! 

It was getting cold, though for Sci-Twi and Senku! 

Chrome: SHIT! This isn't going to be- 

Magma: HEY! DON'T DIE ON ME! 

Magma grabbed them both!

Magma: IF THE CRAP YOU'RE SHOWING ME EVER GETS BORING! YOU'RE DEAD MEAT! 

He threw them both out! 

Sci-Twi: There's no problem. 

Senku: There's nothing boring about science! 

Later ... around a fire... 

Sci-Twi: Thank you, Magma, because of you we're alive. We just avoided the worst case scenario. 

Magma: You mean almost freezing to death? That's what you both get for not having that much- 

Senku: What she means is hugging you to conserve body heat. 

Magma: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGH! 

Chrome: (scared) No one would be happy with that outcome. 

Soon enough... 

Senku: YES! THIS IS IT! THIS IS WHAT WE NEED! 

Sci-Twi: This is our own treasure vault! 

Chrome: YES! THIS IS BAAAD STUFF! WHITE, BLACK, BLUE, YELLOW! LOOK AT ALL THOSE LAYERS! 

Magma: They're just rocks. 

Sci-Twi: Magma, how dare you! When subterranean magma boils water, deep down, teh water shoots up into cracks in that white limestone. 

Senku: But that boiling water has all sorts of ingredients, it's like a total makeover that creates brand-new stones! 

Sci-Twi: It's a Skarn Deposit! 

Chrome: So only the rock near those cracks transforms, huh? 

Sci-Twi: Since you saved the day, Magma, it's yours. 

Magma: HEH! ALRIGHT! TIME FOR THE MAGMA TO FINALLY DO SOMETHING! 

He began to hit the rocks over and over and over and- 

Sci-Twi: YES! WE GOT TUNGSTEN! I'M SO EXCITED!!! 

Chrome: HA! You konw, this might be swell, but I think that the bond we formed deep down in this dungeon is the greatest one of all! 

Sci-Twi: Yeah. 

Senku: Ugh, barf! 

Magma: What he said. 

Sci-Twi: WHAT IS WRONG WITH YOU BOTH?! WE ALL PITCHED IN AND DID SOMETHING! 

Chrome: YOU BOTH ARE DOING THIS IN SYNC AREN'T YOU?! 

The three geniuses continued to mine away at the rocks! 

Magma: HEY! What are you doing?! The sun is going to set! LET'S GO! 

Sci-Twi: But we- 

Magma dragged the three out, carrying all the stones! 

At the village ... 

(Y/N): HEY! THEY'RE COMING! 

Magma blindfolded Senku. 

Senku: Hey, what's this? What's going on? 

Ruby: A little surprise, buddy! 

Kokuyo: It's a present from all of us. 

You presented Senku with- 

(Y/N): TA-DA! 

Villagers: SURPRISE! HAPPY BIRTHDAY SENKU! 

A giant astronomical observatory was before Senku! 

(Y/N): Just for you, buddy. 

Weiss: We came this far because of you involved. 

Blake: It was the right thing for you to be the one that we freed on that day. 

Senku smirked and- 

Senku: NOT BAD! THAT'S GOOD PRAGMATIC THINKING, GUYS! IT'LL GIVE US AN EDGE IN OUR WAR AGAINST TSUKASA'S EMPIRE! 

Kohaku: H-He's right. 

Gen: Rational as ever, I see. 

Senku: Still, how did you figure it out? 

(Y/N): You wrote down a lot of things when you broke out of the stone. Now, we got these babies. 

You looked at the Tungsten. 

(Y/N): Very pretty looking. 

Kokuyo: So, what do we do? Rocks this heavy are sure to do some damage! 

Ruri: Uh ... Father, I doubt that's the plan. 

Kohaku: Forget about him, he's stuck in the Stone Age! 

Kokuyo: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGH! 

Weiss: Ouch, that was cold. 

Sci-Twi: Tungsten has one of the highest heat resistances, along with Rhenium and Osmium. 

Magma: SO LET'S SMASH THEM UP! 

Magma smashed them into pieces! 

Chrome: MAGMA! 

Ruby: WHAT ARE YOU DOING?! 

Sci-Twi: Actually, that was important. 

Magma: HA! SEE I CAN BE SMART TOO! 

(Y/N): Did you behave? 

Magma: Y-Yes Boss. 

Sci-Twi: He saved Senku and me. 

(Y/N): Ah, good boy. Okay! Let's smash! 

You and Magma got to smashing! 

Sci-TWi: Now that the blue jewels are pulverized, we're going to use science to make the powder into something like toothpaste. 

Gen: Ah, science magic. Right. 

Senku: To finish up, we treat the Tungsten toothpaste with hydrogen to remove any rust. At least 1000 Degrees Celsius! The hotter we get it, the stronger the resulting Tungsten. 

Sci-Twi: What we need is to heat up only the Tungsten Toothpaste inside of the glass! 

Kaseki: How will that work? 

Sci-Twi: We're short on time, so Senku and I will work up the toothpaste. 

Senku: Chrome, you can handle the rest, can you handle it? 

Chrome: Are you joking? I bet you're going to be crying for help over in the lab! 

Sci-Twi: It's all you, buddy. 

The two high-fived Chrome. 

Ruby: YEAH! GO THE THREE MUSKETEERS OF SCIENCE! 

Yang: It's a poetic site, right Old Man? 

Kaseki: I have to say, I'm green with envy. Ever since I was a young boy, I loved crafting. They would all just stand back and stare while I built their bridges, and shields. Even in my twilight years, they still treat this old fossil like a laborer. So I got to thinking, how nice it would be to have a crafting pal or two? 

Sci-Twi: Kaseki, you already have that. Us, of course. 

Kaseki: Hmm ... even though I'm a good 50 years older than you sprouts? 

Senku: Age has nothing to do with it. 

Kaseki began to cry and stripped! 

Kaseki: YEEEEEEEEEEEEEEEEEEAAAAAAAAAAAAAAAAAAAAAAAH!!!!! 

Gen: Well, you have fun, I'll- 

Sci-Twi grabbed Gen. 

Sci-Twi: Come on Gen, I know you know chemistry! 

Soon... 

Senku: Okay, simmer the blue jewel dust in some sodium hydroxide. 

Sci-Twi: Then add seashells, hydrochloric acid, and ammonia to make it crystalize, and then bake it, and mix it with honey! 

Gen: Right, enough said! I hear you loud and clear! Honey! Bake it and mix it with honey! 

Soon enough... 

Chrome: THIS WILL DO IT! 

(Y/N): Wow, that's a big magnifying glass! 

Yang: Yeah, like the one that set Magma on fire. Remember Magma? Huh? 

Magma: (annoyed) Y-Yes. 

Ruby: Now for the test! 

Ruby put a bunch of objects of silver and gold objects together! 

Kaseki held the magnifying glass, and Team RWBY and Suika were using the iron forge's flames and soon enough, all of it was melting! 

Kinro and Ginro even got to melt some more! 

And then Yang, Kohaku, and Magma were melting iron too! 

Senku: How's it going? 

Sci-Twi: We got our toothpaste! 

Chrome: Good! 

(Y/N): We got everyone on standby! 

You, Team RWBY, Kohaku, Kinro, Ginro, and Magma were all ready. 

(Y/N): LET'S GO! 

As the toothpaste was put in- 

(Y/N): KASEKI! 

Kaseki held up the magnifying glass! 

(Y/N): NOW GO! 

Everyone got to pumping! 

With that, a new filament was ready! A Tungsten Filament! 

Sci-Twi: Get excited, people, the heart of our cell phones is ready! 

Senku: Get your own damn catchphrase, that's mine.