Patch 2.2.0.8036

Patch 2.2.0.8036 is a Hearthstone patch made available on 26 February 2015. The patch added 3 new card backs, a new debug card, and strings related to upcoming achievements, speculated to relate to the upcoming content addition. The patch was released alongside a hotfix that addressed issues with in-game purchases.

No patch notes were released with the patch.

Unofficial patch notes
The following changes were documented by Hearthhhead.com:

Achievements

 * purchase brm presale
 * ID: 211


 * golden celebration cardback
 * ID: 215

Card backs

 * Molten Core
 * Source: Achievement
 * ID: 18


 * Ragnaros
 * Source: Season
 * ID: 19


 * Golden Celebration
 * Source: Achievement
 * ID: 20

Cards

 * Added: AI Buddy - Blank Slate
 * Spawn into play to clear the entire board, both hands, both decks, all mana and all secrets.