Hearthstone: Knights of the Frozen Throne Announced

Transform heroes into Death Knights and wield powerful new abilities with legendary Hero Cards
Blizzard Entertainment today announced Knights of the Frozen Thron, a new expansion to Hearthstone that invites players to travel to Northrend, where they'll confront the Lich King and be raised as Death Knights, wielding otherworldly powers and stealing life from their opponents, and ultimately ascending Icecrown Citadel to claim the Frozen Throne - and 135 frosty new cards - for themselves.
Coming to Windows and Mac PCs; Windows, iOS, and Android tablets; and mobile phones, Knights of the Frozen Throne card packs will be winnable in Hearthstone's Arena mode and purchasable with in-game gold or real money at the same prices as Hearthstone's other card packs. Starting tomorrow and up until the expansion is released, players eager for an audience with the Lich King can pre-purchase Knights of the Frozen Throne card packs in a special 50-pack bundle, for a one-time purchase per account of 44.99 (PC/Mac/Android)/ 48.99 (iOS). Those who do so will be granted a unique themed card back from the Lord of the Scourge himself.