He nods.

"We're underground right now. The easiest way to get you out is probably just walking out. Most of the people in this base are scared of me, and I can avoid the people who aren't. We'll be noticed when we leave, though."

If he felt like being dramatic he could blow a hole in the ceiling, and that'd probably even make him feel better, but it'd be monumentally more stupid than even his usual plans.

"Yeah, I don't have a very discreet method of tunneling - I could replace missing bits but can't make them cease to exist..."

"I can tunnel, but it'd be noticed faster, since that's obviously something I'm not supposed to be doing."

"Should I take off or hide the wings and tail? And dress differently?"

"You don't look any weirder than some bloodlines. If you usually go around shirtless it'd be odd that you don't have scars, so a shirt would help, but this mostly relies on acting like nothing's wrong."

"I usually do go around shirtless but I can put something on. A remaining problem is that presumably Orochimaru can reproduce the diagram that got you me. I honestly have no idea how it got you me so it could be an irreproducible fluke, but it's not actually good for a supervillain to have a circle that gets an unbound random demon."

"I can steal the related notes, assuming he has them in the usual places; it'll increase our chances of getting caught, but the payoff would be worth it."

"He doesn't keep backups?"

"He does of important things. I'm assuming he thought this at best a summons for a new nin-animal realm."

"Well, I suppose I can check if he has any other copies. I should probably do that before we go note-stealing."

"...That'd help, yes."

"Do you have a copy on you so I can check for instances of the diagrams or whatever elsewhere?"

He pulls out the notes he'd been following. Each only shows a section of the diagram.

Other instances of this and their surroundings in little flammable dioramas?

What looks like a room full of filing cabinets, and that's it. Sasuke seems to have one of only two copies.

"Cool. Where'd he even get this?"

"He didn't tell me. But he's always digging into old records, and he has some international trade. He might've also acquired it from the snakes, since it's also a summoning method, or from Uzushio's ruins, or from somewhere else entirely. If he'd developed it himself I would have expected him to oversee any tests."

"Because if he notices that you tried this, and then stole the only other copy and fucked off out of town, he will probably figure out it was interesting. I'll see if I can conjure from the snake realm..." How's that bowl of spaghetti doing?

Thoroughly eaten!

"Okay, and..." Copies of the notes from there?

Yes; one, in a more brittle condition.

"Snakes have a copy. Can we send your snake friend to wreck it with noodle bribery?"

"...Possibly."

He re-performs the snake-summons, and Shiromi appears.

"Summoner!" she chirps. "Why is the person I don't know about still here, are there going to be more noodles - "

"Yes. I need you to steal something from the White Sage's library," Sasuke says.

She sways back. "...You have very weird plans," she says. "And you'll want Kusana to help me. She's a good thief. And I want new noodles. With spices!"

He drags a hand down his face, summons a mottled brown and green snake about as wide around as his index finger, who listens to the explanation, then asks for an emerald mouse. For reasons.

Cam will provide spicy Thai noodles for Shiromi and an emerald mouse for Kusana, no problem.

And some very grateful snakes will dismiss with their prizes.

"They might take a while, but should be done before Orochimaru notices exactly what I stole," Sasuke says.