Prophet Velen+ Mind Blast is a nice combo, because it can be played in one turn...you don't have to worry about Velen getting silenced or removed.
Priests lack a solid, steady win condition, but have an advantage in that it's quite easy for them to mill their entire deck. If you ever watch Priest streamers like Amaz, you'll notice that he very rarely ever has less than 5 cards in his hand the entire game. Board control is easy to obtain with combos like Auchenai Soulpriest +Circle of Healing, or Wild Pyromancer + Power Word: Shield, and so it essentially becomes a game of attrition. It's boring, but it can work. The drawback is, if you come across a skilled player with a deck that has a solid win condition or better draw than you, you're screwed. I remember Hafu making fun of Amaz one time, telling him she felt bad that he mains Priest, because she can watch him do all these cool combos and get really creative with his deck comps, but then he still just loses to mindless decklists.
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Hello! Hellooo. He-llooo...
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Thats true! I dont know a game where you can have everything what you want in few month. Of course you need too get card by card and have luck to get the cards you needed for your deck. For me, I opened 40 packes with a few gold and 1 legendary. It can be better, thats for sure, but if you already have all the cards you want, the game will be bored because there is no goal anymore.