Cards that you want in your opening hand are the 3 drop spirits along with Evil Presence or Silence to aid them. You also might want air on turn 1 into tower on turn 2 for those 3 drop spirits since they require 2 Air Threshold. This depends on your hand of course but keep it in mind! You almost always just want to grab K Mech with Highland Princess for your Haunts, TStorm, Bolts and 13 Treasures.