Mulligans
Aggro Mulligans
basically you want board clears and health to get to the late game, Barnes for early summons and manipulator to keep him out of your summons list and if all else goes wrong, to copy your opponents big minion before you shadow word it.
Control Mulligans
the same as aggro but with bigger later AOE and more concentration on early summons and resurrections. with both types, the main thing is putting your big minions back in the deck for summoning.
works similar to the other big EZ priest decks but with the ability to play, discover, summon, copy or draw with y’shaarj blood of the ancient ones until you get two on the field and summon the ancient one which can then be resurrected if it is killed or copied with a faceless manipulator.