I don't know if we've been over this before, but has anyone played this? My friend showed me it last night and I'm hooked. It's kind of a simplified Magic, but with a few unique differences to rules and such. For one, it has like a dozen "mana" types that have their own card selection and you can mix and match as you choose. Combat works a little different as does resource management, but if you've played Magic, you'll pick it up in like five minutes.

http://www.elementsthegame.com/

It's free to sign up and play and supports PvP action so if any of you end up digging it, challenge me! My username is the same as on here.