Aurimus
What was the thematic decision behind the number 16? Why did you choose that?
Brandon Sanderson
I really like how divisible it was. It looked really cool when I was playing with things like an Allomantic table and whatnot. It was mostly an aesthetic choice. Like, it just felt right.
Aurimus
So was it originally the Shards or the metals you decided on?
Brandon Sanderson
So, I started with the metals. And then expanded out to that, yeah. So what you've gotta remember is, like, I write Elantris without knowledge of the cosmere. I knew I was gonna do something, but I didn't know what I was gonna do. And then I wrote Dragonsteel, and in Dragonsteel I had all sorts of theories and plans, but I never canonized any of that. And when I sat down to write Mistborn, I said, "All right. We're building the cosmere for real now." And before then I had just kind of been winging it. So when I did Aether of Night, which I put Shards in, I was like "Okay, there'll be some of these things, and what-not." Mistborn was, like, the first real cosmere book, if that makes any sense.