Mulligans
General Mulligans
If you manage to get Northshire Cleric in mulligan you can play it first and then play quest .
A classic Combo Priest deck relies mostly on Divine Spirit + Inner Fire combo to create very big minion that attacks enemy face . In this deck you retain the power of combo but you also have alternative win condition which is Activate the Obelisk . Enemy might not know what to expect beacuse of quest and some other cards which are not played in Combo Priest (this deck benefits partly of fact that it is unknown) .