The first expansion for popular online card game Hearthstone is out now. It’s called Curse of Naxxramas and adds 30 new cards. But Blizzard is already hard at work on adding many more new cards.

Hearthstone’s game director, Eric Dodds, tells Massively that the next expansion won’t be another single-player adventure. It will add over 100 new cards that will be available in a new type of card pack.

Currently, you can either earn expert card packs in-game or shell out some cash for bundles of packs of random cards.

Dodds says the new expansion cards will have a bigger impact on the game than the 30 Naxxramas offered.

Longtime players will surely appreciate having 100+ new cards to play with. As soon as we know more we’ll share it with you here at IGN.