Mulligans
General Mulligans
You're basically mulliganing for Prince unless you have like a crazy opening hand otherwise, like bloodsail kabal fire fly or something.
This is my zoo/tempo/swarm Priest deck. It utilizes big tempo cards like blazecaller, bonemare and defender of argus to swing the board (which you will almost always have control of.) Honestly, if you have Prince Keleseth in your hand on turn 1, ez win. His buffs on your minions like Blazecaller, Bonemare, and Lyra will make those cards that much more swingy. Even Crystalline Oracle can be made into an amazing board presence just by adding +1/+1. Worked for me all the way up to rank 15, and im still climbing. Super fun deck.