Patch 3.1.0 is the first major content patch for World of Warcraft: Wrath of the Lich King. Among the highlights of this patch are the opening of the much anticipated Ulduar raid, the Argent Tournament and many notable class changes. API Changes have been summarized at Patch 3.1.0/Consolidated API Changes. Undocumented changes can be found on Patch 3.1.0 (undocumented changes). Latest patch notes can always be found: