"An arm with attitude, eh?" Oskar chuckles, stroking his beard. He leans forward and examines the gauntlet. "Let's see what I've got on hand, so to speak."
The dwarf moves to one corner of the shelf, pointing to one item after another as he moves along the rear perimeter of the room. Many of his goods could be considered magic-adjacent rather than truly magical in their own right, such as material components and foci, while most of the rest are low-powered magical items such as potions, cantrip scrolls, or basic tokens. Nonetheless, there are easily several hundred gold pieces of magical goods lining the shelves of this shop, and he may even more valuable goods secured out of sight.
"Let's see, let's see," Oskar says, returning to the counter. He spreads a collection of material components out in front of Crow. "We could incorporate some of these materials into your glove. They're used for casting spells, see? Here's some copper wire - that's used to send messages, like House Sivis. Very convenient if you need to tell someone across the way without anyone knowing. We've got a couple of lodestones here - magnets. That's used to magically repair something. You look like someone who wants to keep all your equipment in tip-top shape. We could work this feather in, too. That's used to stop you or other things from falling. Did you hear about that girl who got hit with a brick the other day? She'd still be here if she had this. Very useful in the City of Towers."
He runs his hand through his beard, looking up at Crow, then shoves the material components to the side of the counter. "Ah, this is kid's stuff! You don't want this. I can tell you're something special. Let me get you the prime gear."
He moves to the back shelves, plucking up a flat stone and a polished orb of obsidian. On the same shelf, Crow can see what looks like a warforged hand, but smaller - even smaller in scale than Rolin's arm. It looks like it would fit a gnome or a halfling. Oskar returns to the counter and puts down the two stones.
"This here's a cleansing stone," he says, holding up the flat stone. "It'll clean your clothes, your hair, everything on you. No more bathhouses, no more laundry! What an investment, eh? House Ghallanda uses them in the best of their best inns. And this is a focus orb - with this, you don't need any of these." He motions vaguely towards the material components. "Just hold it and cast. But! It's more than that - it protects you against necromancy. I got it from a veteran of the Karrnathi front."
He pauses, looking Crow up and down slowly and thoughtfully before nodding sagely to himself. "You know...I think I have something perfect for you."
Without taking her eyes off her, Oskar reaches under the counter and pulls out a lockbox, setting it almost reverently on the countertop. Pulling on a chain around his neck, he draws a small key from his shirt and unlocks the box. "I don't show this everyone, you know," he says as he does so. "Only people that will appreciate it."
From inside the box, he pulls out a well-crafted tinker's multitool. With a flick of his wrist, the tool transforms into a calligraphy pen. With another flick, it becomes an awl. Then, a hammer. A ladle. A paintbrush. A compass. "The true universal tool," Oskar says, his voice almost a whisper. His eyes glint with the look of a man sharing a treasured secret. "There's power in this. Not just for any artisan - magic power. Only a truly gifted artificer can get the most out of this."
He holds Crow's gaze for another moment. There's a sound behind her, and she realizes the warforged have moved, most likely to prevent her escape if she decides to snatch something and run. Oskar reverts the final object to a multitool, then tucks it into the lockbox. It remains on the countertop, but he rests a hand atop it. "So. You like what you see?"
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