The "singleplayer" for the expansion is coming next week. This time, Blizzard is doing things a bit differently. Instead of an endurance test, Hearthstone will be doing 3 types of puzzles:

Lethal - kill the enemy in one turn

Mirror - copy the enemy board exactly

Board Clear - clear the entire board (your minions included)

Survival - Prevent yourself from dying

We are also getting 3 free Boomsday packs next week for logging in.