Mulligans
General Mulligans
Choose these for aiming to have in your opening hand as they are the lower cost cards in the deck that can be used early game, as well as draw power to get to more cards.
A theorycraft spellpriest deck that should end up swarming the field with minions from the summoning stone. Late game high mana spells with summoning stone also allows for big hitters to go for the win.
Yogg-Saron is in as a bit of unpredictability and to mix things up a bit with his awesomeness.