It’s time to study up The Art of War and rewatch Patton because Blizzard is about to unleash The Military Quarter in Hearthstone.

The collectible card game’s first add-on pack is getting its third episode tonight. The Military Quarter will unlock around the world late this evening, and it will give players three more boss fights to work through. As with the previous two wings, The Military Quarter will cost you $7 or 700 in-game gold, or you can buy all of the Curse of Naxxramas downloadable content in one go for $20. So far, this first batch of DLC for Hearthstone has helped the free-to-play game’s performance on the iPad, and it has likely done the same on PC.

Here’s when the latest episode goes live:

  • Americas: 11:59 p.m. Pacific time tonight
  • Europe: 11:59 p.m. Central European time tonight
  • South Korea: 12:49 a.m. Korean time Wednesday
  • Taiwan: 11:59 p.m. China time tonight
  • China: 11:59 p.m. China time tonight

Curse of Naxxramas looks like it is giving Hearthstone in a boost in terms of revenue. The game is now the 17th highest-grossing iPad game in the United States, according to market-tracking firm App Annie. That’s up from around 25th highest just a few weeks ago.

Hearthstone is Blizzard’s first free-to-play game as well as its first mobile title, and the company is likely paying close attention to how well Curse of Naxxramas performs. If each episode of the DLC continues to perform well, then it’s likely fans fo the game will see more add-ons like this in the future.