If we seek to bring those to Christ supporting things that lead people away from him is counterproductive. Certainly no game is perfect
the question is can we help more than we harm with what we play. Christian clans bring Christians together in fellowship and (hopefully) show light to the unsaved but they can also promote an acceptance of immorality if not mindful of their actions. If you want people to see Christ in you they are going to see everything else as well. You may be able to play a porn game avoiding lust but what does that say to the world? Supporting them with your money means they will make more porn games. Thus TV, movies and games are full of garbage nowadays because no one said no we should not support this. We strive to show Christ's character in our actions and words, in how we play, but even choosing to play or not play a game, or class, is an action. Regardless there are a lot of other games I would avoid supporting before WoW. Ones that actively seek to push the beliefs of homosexuality, atheism, Taoism, etc. with guile and emotion.
I may, depending on what it is meant by it, differ in the idea in it's a personal choice because everything we do effects others and I always believe there is a right and wrong choice, by God. We just don't always know what the right choice is and it may be different for some, or "personal", as Corinthians mentioned, but it's still there. Some things we should condemn though as the Bible does.
I wouldn't sweat playing a warlock class so much. I don't think that many people take it, or really the whole game, seriously. Ask what does the Bible say and ask yourself if you can see Jesus doing it. If you can see Jesus doing it go for it, if not don't. Peace
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