"Is that a funny eye colour?" he inquires, peering into the relevant set of eyes. "It's rare on some planets, I guess. Anyway, Devices speak and understand all languages. There's a language I heard first but it's not really any more mine than any of the others and it's not my favourite. How about..." he thinks for a few seconds, then switches languages, "English, they spoke it in parts of the planet I was just on and it has a lot of the right technical vocabulary for some reason even though barely anybody there could do magic and most people didn't even know it was a thing."
And now, more ice cream. He hugs his spoon. It is a good spoon. It makes eating ice cream easier and that is great.
Nom!
"...Whoa," says Brilliance, also in Draconic. "Yeah, that's a lot of vocabulary, all right. Why does it have words for this stuff? It's a dragon language, not a Device language. Is it magic? It's totally magic."
Pause for ice cream. Ice cream is important.
"It's pretty common. Some of the most basic Device stuff, things that are common across all Device types, has combat applications - you remember I said, we protect our wielders from harm? The thing that does that is called a Barrier Jacket, and it's basically magical combat armor. Almost any Device can do it. I don't actually know of a way to do it without one. It'll protect from lots of things, not just straight magical damage, but it's definitely combat-oriented."
"They do not even slightly get to pick our personalities," Brilliance confirms. "Also, ice cream is the best."
"Yeah, well, my perspective here is the exact opposite of theoretical. I don't know of any good way to handle it, but I've been through plenty of bad ones."
"They're born with them. As far as I know, there's no other way to get one, but it's not a blatant magical fact like Device intelligence, there could be some way to get them from another source. Other things about linker cores... they're connected to mana colour; the core has a 'colour'" (the word he uses is the equivalent of colour for one of his magical senses, and is clearly linked to the visual version of the concept) "that translates to the visual colour you see when somebody uses visible mana. Devices don't have linker cores but we do have mana colours; mine looks like this," and he holds his hand out over the table and deploys a small magic circle on its surface. The circles and lines of the glowing diagram ripple through all the colours of the rainbow in a semi-random order at varying speeds.
Thinking about it over another bite of ice cream. How is this stuff so tasty? It is amazing.
Ice cream complete for now, he says thoughtfully, "It might be more accurate to say I am a linker core, instead of that it's something I'm skipping somehow. Humans... on humans it's more like a function module, a pretty central one, but still something that's... a part of them rather than part of them? With me it's seamless, there is no separation between me and the part of me that handles mana because I just am a kind of thing that handles mana. With human mages, there's a human, and then they have an integrated linker core."