"Right, so, it's 2159 where I'm from and medical science has advanced correspondingly. I keep on top of it more than I do, say, the advances that have been made in orchid cultivation, because, one, it's useful for personal alterations if I ever want to make any - the wings and tail I had models, if I decide I want something non-standard I'd better know about how people are put together - two, in case I'm ever on a summon and have the flexibility and opportunity to make stuff to heal someone. So I know and can conjure up notes for a century and a half of medicine you don't have and I'm not sure where to drop it to good effect. Mars I'd just make a little spaceship and go there and give it an atmosphere and topsoil and some plants and water so it would be comfortable for Earthlings who visited later. That would be an example of something I could do while ignoring magic besides my own, because it sounds like a mess."