Hearthpwn

Here's the video showcasing proper usage of the deck in order to defeat the Lich King!

Strategy:

The Lich King uses a 1 mana spell which sets your hero's health to 1 without fail on turn 1. The change is not permanent, so you can heal it back or block damage through secrets such as Ice Barrier and Ice Block. However, I found it easiest just to attempt to out-tempo and highroll the Lich King before he gets his turn 7 board flood off.

Mulligan:

Mana Wyrm, Sorcerer's Apprentice, Stargazer Luna, Flamewaker, in that order. Also if you are running Kabal Lackey and Mana Bind you can steal the 1 mana set your opponent to 1 health spell and play it for 0 when you please, so that would be your mulligan priority should you choose to run them.