37.0 — Black Empire preparation and Journey
The October 13 client update prepares Reign of the Black Empire, starts Journey and the Pre-Release Tavern Brawl, and fixes card interactions. The expansion launches October 20.
Released October 13, 2026
Blizzard published the notes on October 12. Patch 37.0 went live on October 13 to prepare the game for Reign of the Black Empire.
Journey and the Journal
Journey combines story, quests, rewards and events in the Hearthstone Journal. Achievements are now called Feats.
Pre-Release Tavern Brawl
From October 13 to October 20, this event lets you open new packs early and play with the expansion's cards. Free trial Common and Rare cards work only in this event and leave when it ends.
The expansion launches later
Reign of the Black Empire and its new Rewards Track launch October 20. The client update and expansion have separate release dates.
Card interaction fixes
The patch also fixes card interactions. Read Blizzard’s linked notes for the full list.