Hi there!
I'm new to this forum. I'm a Christian, as well as a long-time video game nerd.

I remember when I was a younger man, in my teens (I'm 25 now), I had my reservations about magic in fantasy movies, books, and video games. At first, I wouldn't even play, and had no interest in playing such games for this very reason.
I don't know exactly what changed, but as I got older, and started reading great fantasy stories like Lord of the Rings and Narnia (both written by Christian Authors BTW), I began to think less and less about it. And What's more, this new, not so bothered attitude towards fantasy Magic came not as I was drifting, but as I was really spending a lot more time with God, reading the Bible, praying, ECT.
The way I now look at it, nothing they do in fantasy games about magic is anything even in the vicinity of what they actually do in real life magical circles. Rather the idea of magic is being parodied in order to create an interesting story in which the heroes as well as the villains are capable of some extraordinary things that people can't do n real life. It's meant to be fun, not to offend against Christianity. The vast majority of people who play fantasy games involving magic, or who are otherwise exposed to fantasy entertainment are not influenced to go off and join magical orders, because most people understand that it is just fantasy. Now I know the Bible tells us to avoid even the appearance of evil, but then I have to ask myself, does playing Oblivion actually make me look evil? I mean, people can see that I'm a Christian by the way that I live. I don't smoke or drink or use drugs or cheat on my wife or spend irresponsibly. Everyone I know knows that I am a Christian, and so far as I know, it never crosses they're mind to question the validity of my faith on account of a video game. On the other hand, if I threw a big fit about magical RPGs, and said they were 'of the devil', it might cause a few of them to question the validity of my claims of sanity, and that in turn could cause them to suspect (as many already do) that all of us Christians are a bunch of brainwashed fanatics.
Now, my point is not to say "You should play fantasy RPGs!", but to say, I personally don't see this as an affront to my faith, and I don't think the people who develop such games actually intend to offend against it. It is meant as harmless fun, and I think it is harmless for the most part. And to what extent something like Final Fantasy does harm some poor soul, well, the way I look at that, even the Bible has badly influenced people (people who took it completely the wrong way) to go out and do wrong things. Some people are just unstable like that, and if it wasn't magic in video games it would have been something else. The game devs shouldn't be blamed for extremely rare instances (and come to think of it, I can't think of even one instance were a person was led into a life of sorcery through video games, though I may be wrong). I just think a lot of people take things too seriously.
Now, that's just how I see it now, and I respect anyone who has another opinion. If you feel that the Lord is convicting you about it, but you're not sure exactly what to think, then I would recomend at least fasting from video game magic for a good long while, and earnestly ask God to give you wisdom and understanding on the subject, to lead you in the right direction, because he will. (James 1:5)