The idea behind this is combining summoner priest (since that’s a minion heavy deck anyways) with Lady in White with some dragons for synergy. It has low removal early game but instead it has stickier taunts that get a boost from LIW if you happen to draw them late game. Doomsayer is in here because the thought process is either you draw him early to slow down rush decks, or you have him after you play LIW in which case they either throw away their board at a 7/7 or they lose it due to destroy. Let me know if you think there are any better cards to substitute.