Blizzard announces the March of the Lich King has begun in Hearthstone with the launch of the newest expansion for the digital card game. This adds 145 new cards to the mix, introduces a new Undead minion type, and raises the Death Knight as the game's 11th playable class. Here's the deal:

Upon completion of a short prologue, players will be armed with an all-new Death Knight class, unlocking 32 unique core cards to challenge the meta. All Death Knight heroes will be equipped with Ghoul Charge, a hero power which summons a 1/1 Ghoul with Charge that dies at the end of the turn. Plus, even your dead minions will be cause for celebration, as they play a pivotal role in powering up specific cards requiring Corpses. Death Knight is a powerful, flexible class, powered by three Runes: Blood, Frost, and Unholy. The player’s chosen devotion to those Runes will determine which cards they can put in their deck. Learn more about Rune deckbuilding in the Death Knight introduction article, and be sure to check out the Path of Arthas bundle ($24.99) for even more Death Knight class cards.