Disclaimer: I am not Rick Riordan or George Lucas.

Enter Ben and Jag (returned to human form), moving through a dark underground tunnel.

Jag. What now?

Ben. Okay, don't freak. I'm going to summon a little fire, just so we can see.

Jag. Thanks for the warning.

Using his pyrokinesis, Ben summons a small flame, which illuminates the tunnel.

Ben. Well, it only goes in one direction.

Jag. Let's find Tahiri.

Ben and Jag venture further down the tunnel. When they finally come across Tahiri, she is focused on a door.

Ben. Hey.

Startled, Tahiri draws her lightsaber and whirls around.

Tahiri. What are you doing here?

Ben. Sorry. We ran into some angry tourists.

Ben explains his and Jag's encounter with the Vagaari.

Tahiri. I hate Vagaari. I thought Danni made them promise to stay away.

Jag. Oh . . . Danni made them promise to stay off the ship and not possess any of us. But if they followed us, and used other bodies to attack us, then they're not technically breaking their vow. . . .

Ben. Great. Vagaari who are also lawyers. Now I really want to kill them.

Tahiri. Okay. Forget them for now. This door is giving me fits. Ben, can you try your skill with the lock?

Ben. Stand aside for the master, please.

Tahiri yields the way for Ben, who examines the lock.

[surprised] These letters are Aurebesh.

Tahiri. Well, lots of Imperials spoke Old Corellian.

Ben. I guess. But this workmanship . . . No offense to you Remnant types, but this is too complicated to be Imperial.

Jag. [snorts] Whereas you Jedi just love making things complicated.

Ben. Hey. All I'm saying is this machinery is delicate, sophisticated. It reminds me of . . .

Ben trails off, trying to remember why this lock appears familiar.

It's a more advanced sort of lock. You line up the symbols on the different rings in the right order, and that opens the door.

Tahiri. But what's the right order?

Ben. Good question. Jedi holocrons . . . astronomy, geometry . . . Oh, no way. I wonder . . . What's the value of pi?

Jag. [frowns] What kind of pie?

Tahiri. He means the number. I learned that in math class once, but . . .

Ben. It's used to measure circles. This sphere, if it's made by the guy I'm thinking of . . .

Tahiri and Jag stare at him blankly.

Never mind. I'm pretty sure pi is, er, 3.1415 blah blah blah. The number goes on forever. But the sphere has only five rings, so that should be enough, if I'm right.

Jag. And if you're not?

Ben. Well, then, Ben fall down, go boom. Let's find out.

Ben turns the rings, starting on the outside and moving in. He lines up the correct numbers so they make the value of pi. Nothing happens.

I'm stupid. Pi would expand outward, because it's infinite.

Ben reverses his previous act; this time the door swings open.

That, good people, is how we do things in Ben World. Come on in.

Jag. I hate Ben World.

Tahiri laughs.

Ben leads Jag and Tahiri inside a workshop containing variety of lost Old Republic technology: holocrons, code cyllinders, and even a few deactivated battle droids.

Ben approaches the droids.

Ben. These would be astral if they worked.

Jag backs away.

Jag. Those things are going to come alive and attack us, aren't they?

Ben. [laughs] Not a chance. They aren't complete. Look, the head's wiring has been disconnected. And here, at the elbow, the pulley system for this joint is out of alignment. My guess — the Imperials were trying to duplicate an Old Republic design, but they didn't have the skill.

Tahiri. [raises her eyebrow] The Imperials weren't good enough at being complicated, I suppose.

Jag. Or delicate . . . or sophisticated.

Ben. Hey, I just call it like I see it. Still . . . a pretty impressive try. I've heard legends that the Imperials confiscated the writings of Raith Sienar, but . . .

Tahiri. Sienar? Wasn't he an ancient mathematician or something?

Ben. [laughs] He was a lot more than that. He was only the most famous son of Yun-Ne'Shel who ever lived.

Jag. I've heard his name before. But how can you be sure this droid is his design?

Ben. It has to be. Look, I've read all about Sienar. He's a hero to cabin Nnne. The guy was Old Corellian, right? He lived in one of the Old Republiic coloniy worlds near Bastion, back before the Empire got all huge and took over. Finally the Imperials moved in and destroyed his planet. The Imp general wanted to spare Sienar, because he was so valuable . . . sort of like the Lemelisk of the Old Republic. But some stupid Imperial soldier killed him.

Tahiri. There you go again. Stupid and Imperial don't always go together, Ben.

Jag. How do you know all this, anyway? Is there a Tatooinian tour guide around here?

Ben. No, man. You can't be a Jedi who's into building stuff and not know about Sienar. The guy was seriously elite. He calculated the value of pi. He did all this math stuff we still use for engineering. He invented a hydraulic control circuit for energy distribution.

Tahiri. A hydraulic circuit. Excuse me for not knowing about that astral achievement.

Ben. He also built a built a superlaser that could obliterate enemy ships. Is that astral enough for you?

Jag. I saw something about that on the holovid. They proved it didn't work.

Ben. Ah, that's just because modern mortals don't know how to use Adegan crystal. That's the key. Sienar also invented a massive net that could simulate a mass shadow and pull enemy ships out of hyperspace.

Jag. Okay, that's lubed. I love interdiction fields.

Ben. Well, there you go. Anyway, all his inventions weren't enough. The Empire destroyed his world. Sienar was killed. According to legends, the Imp general was a big fan of his work, so he raided Sienar's workshop and carted a bunch of souvenirs back to Bastion. They disappeared from history, except . . .

Ben indicates the holocrons.

Here they are.

Tahiri. Durasteel grav-balls.

Ben tries to hide his irritation.

Ben. Guys. Sienar constructed holocrons. The Imperials couldn't figure them out. They thought they were just for telling time or following constellations, because they were covered with pictures of stars and planets. But that's like finding a blaster rifle and thinking it's a walking stick.

Tahiri. Ben. The Imperials were top-notch engineers. They built aqueducts, roads . . .

Jag. Siege weapons. Public sanitation.

Ben. Yeah, fine. But Raith Sienar was in a class by himself. His holocrons could do all sorts of things, only nobody is sure . . .

Ben trails off as he notices a collection of ancient scrolls; this excites him so much his hands burst into flames.

Oh, kriff. This is it.

Ben gingerly picks up one of the scrolls.

Guys. This is the lost journal. Sienar wrote this, describing his construction methods. But all the copies were lost in the Dark Times. If I can translate this . . . [takes a deep breath] The secrets of Raith Sienar. Guys, this is bigger than Vodo-Siosk Baas's datapad. If there's an Imperial attack on the Jedi Praxeum, these secrets could save the Praxeum. They might even give us an edge over Abeloth and the Yuuzhan Vong.

Tahiri and Jag exchange looks.

Tahiri. Okay. We didn't come here for a scroll. But I guess we can take it with us.

Jag. Assuming that you don't mind sharing its secrets with us stupid uncomplicated Imps.

Ben. What?

Ben glances over at Jag and Tahiri, only now seeming to realize that he has offended them.

No. Look, I didn't mean to insult . . . Ah, never mind. The point is this is good news.

At that moment an R4-P astromech droid comes to life and uses its manipulator arm to knock Tahiri and Jag unconscious.

Ben rushes to their side, but his path is impeded by two of the battle droids. As it turns out, the Vagaari followed the demigods down the tunnel and have possessed three of Raith Sienar's creations.

Bearsh. [speaking through a battle droid] You cannot escape us, Ben Skywalker. We do not like possessing mechanicals. But they are better than tourists. You will not leave here alive.

Exit all.