Hearthstone beta, odds are you think you're pretty good at the game. If you've read up on it, you might still think you have a solid grasp of the strategy. So maybe you'll want to test your skills in a format that requires a different sort of strategy, something that will put your ability to build a deck on the line. If that's like your sort of game, perhaps you'll look forward to paying the entry fee and stepping into the Arena, a draft-style format that forces players to construct decks on the fly and pit them against similar constructions.
After paying the entry fee, either through in-game gold or real cash, players will be presented with three random heroes. Picking one will set you to work building a deck of 30 random cards out of several selections, with each choice being final. Once you start in the arena, you'll try to accumulate as many wins as possible before hitting three losses, earning a more powerful key for better rewards each time you win. The game isn't released yet, but this mode is all the more reason for beta players to keep practicing and aspirants to keep their eyes peeled once it's available for everyone.