Hearthstone’s next adventure is One Night in Karazhan

As many guessed, Hearthstone’s next adventure will take place in Karazhan, the magical tower that also serves as a raid in World of Warcraft.

The adventure is One Night in Karazhan, and it adds 45 new cards to Blizzard’s popular, free-to-play game. The first wing will release on August 11, with additional ones coming out each following week for a month. Hearthstone is the leader in the $1.2 billion digital card game market, making over $20 million a month. It’s available on PC, iOS, and Android. Hearthstone is also one of the most popular games in the esports market. According tor research firm Newzoo, Hearthstone was the fourth most-watched esport on Twitch in June, making it one of the leaders in what research firm SuperData estimates will be a $1.23 billion market by 2019.