[That would be both fascinating and a bit disturbing to hear - it's not something even magic can accomplish on Tamriel. They have the occasional ghost, to be sure, but nothing quite like that.]

It is; magicka flows into the mortal plane of Tamriel from Aetherius, the realm of the gods. But as I said, it's internal - whatever the original source, it's part of me now, which is why I can still cast spells on a world other than my own. I hadn't been off-world before coming here, no; we don't have anything like the level of technology required to make it possible.

[He has to give the question about complex spells some thought.] There's a master-level Destruction spell I've read about, Lightning Storm - lightning is the easiest of the three elements to lose control of, and Lightning Storm requires the caster to channel it continuously.

[He certainly couldn't, were their positions reversed - which is yet another reason he doesn't mind at all answering Spock's questions.]