Hearthstone’s upcoming Blackrock Mountain adventure adds 31 new cards, hits in April

Hearthstone: Heroes of Warcraft is getting another wave of new content.

Blackrock Mountain: A Hearthstone Adventure adds 31 new cards to Blizzard’s popular digital game — and the potential for the publisher to further boost the online revenue it’s already making in the nearly $30 billion mobile game market. Players can unlock the new cards by beating computer-controlled bosses and class challenges, similar to the Curse of Naxxaramas adventure. Both are based on raids (dungeons that require cooperation from a large group of players) found in Blizzard’s popular online game, World of Warcraft.