The Arena is a cool ‘sealed draft’ style sub-game. For 150 gold you get to pick one of 3 randomly allocated heroes, then make a deck from 30 single selections from 3 cards. Upside is you don’t have to worry about playing George Osbourne who’s spent 5000 quid on his deck of legendaries with custom ‘prole-skin’ card-backing.
It’s a good way to get extra free gold too.
Hearthstone is Lots of Fun. Free-to-play cardgame from Blizzard. Good fun, and you can earn gold to pay for more packs of cards pretty easily. If you’re not playing it, give it a go;
I’ll post some tips on getting gold and cards I’ve found. First is about Questing;