About

The second infusion of new cards to be added to the game, the expansion features 143 new cards (123 of which are collectible), with a strong mechanical theme, and introduced the Mech minion type, as well as debuting the long-awaited spectator mode. The expansion was debuted in an arena-only launch event on December 4th, 2014, with the full launch taking place on December 8th/9th/10th.