Hearthstone 34.4 patch unlocks Echoes of the Infinite, Arena overhaul, and Ysera pet

Hearthstone Patch 34.4 drops with the Echoes of the Infinite Mini-Set (38 new cards) and a revamped Arena season built around Taverns of Time. Two event windows run Jan 13–Feb 3 and Feb 3–10 offering free rewards, while Darkmoon Faire Treasures reintroduces the Ysera pet and other cosmetics; pet XP is doubled to speed skin unlocks. The update also includes bug fixes and related balance/visual tweaks across cards and effects.