After the massive success of Hearthstone's first adventure, Curse of Naxxramas, Blizzard is ready to give players even more to do in the strategic, Warcraft-based card battler.

An upcoming expansion announced at PAX Prime by Game Director Eric Dodds will add about 100 new cards to the game's growing collection, as well as a new type of pack.

Massively spoke with Dodds at PAX, asking if the load of additional cards would disrupt the game's balance.

Dodds agreed that maintaining balance is a challenge, but spoke highly of their internal testing team's ability to keep things in order.

This expansion will be one of several things the Hearthstone team is hard at work on, which also include an Android port of the game and spectator mode.

If you're still working your way through Hearthstone's first expansion, the solo adventure Curse of Naxxramas, check out our guides below.