Mistborn travels to Roshar, what does he or she use to get Invested?
*pause* So. *pause* I think I've talked about this before on the 17th Shard, but I'm not 100% sure and so I don't want to anything right now, not knowing what I've said. But you can look it up. You can ask Peter. Hey Peter, have I talked about someone using-- Have I ever in an interview before talked about using metals... A Mistborn travels to Roshar and uses the metals there?
I think that you have said that they could do it.
I said it. Okay, so the thing about the metals you have to understand is the metals are a key, the metals are not magical themselves, except for specific ones. If I've already said that I can tell you, go to Roshar and you could use the metals that are there to power your Allomancy because the difference is in your soul and you're actually drawing directly from Preservation. Remember that on the Spiritual Realm, this is the big tidbit--they're listening. On the Spiritual Realm time, distance, and space are irrelevant. It's a place where time and space are compounded in one. So anything that exists on the Spiritual Realm, space doesn't matter for it.