
I guess since I answered last time, I'll give it a shot again.
With 666 in the Bible there are a few things to point out:
1) 666 refers to a symbol, not a quantity. It says 666 is the number of a man, not that there are 666 men. In other words, if you have 666 of anything --- grapes, dollars, or shadow damage --- it is just 666 of them, and it is most likely harmless, whereas you may be well to stay away from grapes, dollars, or shadow damages that have 666 tattooed on to them. Or rather, as I point out in my next point, DCLXVI tatooed on them.
2) Also, that symbol wasn't actually "666". It was "DCLXVI" which, interestingly, shows up engraved into the walls of quite a few of the Roman Emperor's palaces during the "Augustus" (self-proclaimed "Divine Emperors") years.
3) Many Christians believe that anything associated with the number 666 is therefore tainted with evil and will cause them to lose their salvation if they associate themselves with such an object. Pardon my British, but that is absolute bulloxs. God is Faithful and Able (completely) from keeping you from falling just because you ate a grape, spent a dollar, or cast Corruption that had 666 somehow associated with it.
I guess the question to ask is:
Are you willing to cut yourself of from the fellowship of the saints and your witness to the online community just because there is a remote chance that someone at Blizzard Entertainment worships a "god" that is infinitely less powerful than Jesus Christ and furthermore has absolutely no control over you life since you surrendered to Christ? I'm not.
I hope this has helped, but remember --- the only One who knows for sure how the game may affect your life (positively or negatively) is God Himself --- I strongly suggest you sit down with Him and talk your feelings through with Him.