"Oh, and I looked for proof the last few days. I found the same burst that was emitted when you claimed to kill a witch in several cities, and looking at recordings, every single one of them happened soon after people started killing themselves nearby. So, I believe you about all this, I have external proof. That's why I'm willing to trust you with a ray gun."
"I could also just look at their fingernails, but sure, why not."
"Nah. I mean, I don't hate it cosmetically, but it came with the package."
"Yeah, I still want to know why the evil aliens found their current model to make more economic sense than asking for donations from depressed people or something. Apparently some people have more magical potential than others - that's why all the puella magi are girls - but still."
"I'll show you how to assemble it when it's done. The central engine is the hardest part." He points to it - a bundle of metal with points to attach other things, just narrow enough to fit into the shield, but almost as long as she is tall.
"That one doesn't work right. I don't think I can make it small enough to fit into the shield, next thing I was going to try is to make it in three wedge-shaped parts, which you could put together with the joiner. You mind making my silver now? I'll get you the ray gun in a bit."
"I won't." She puts it in her shield, takes it out again. "Do I get an instruction manual?"
"Cool. Do you not believe me about the time reset thing, or do you just not think that's a good enough reason to authorize lethal force?" she wonders.
"I admit that the time reset thing sounds likely given the available evidence, but I can't verify it. I learned not to hand out tech without supervision and safeties over a hundred dimensions ago. I sold a relatively tech-poor world a lot like yours un-safetied power tools and shuttles. The two major powers turned them into fusion weapons inside of a year and annihilated each other. So I just - don't do it without all the safeties I can cram in anymore. It'll hurt witches just fine, probably."
"Probably," she says. "Well, lucky me I already died once and know it just resets me, so a nasty surprise isn't game over."
"I try to avoid it. I've only done it a few times - usually I reset if it looks like I can't avoid it - and I'm not, like, used to it."
"Cool. We don't have casual space travel and I'm nowhere near being able to assemble it myself inside a month."
"I'll probably want you to duplicate things as long as you're on board anyway. But before we leave you should get some local food and meet me for pickup later. I only had a week's worth in the kitchen when I arrived and I'm down to a couple days now. Hydroponics don't take well to dimensional jumps. Get some meat if you can, I like meat."