Hearthpwn

This deck works great against all decks, beats even Secret paladin! :)

Herald works great in Murloc priest, I even believe it works better here than in any other priest deck that I know of. 

With Herald Volazj it's amazing to duplicate ANY murloc; Especially Warleader and Old Murkeye!

Use Vol'jin to reduce large enemy minion's health and trade up with your smaller murlocs while still developing your board! :)

Dropping Kel'thuzad after Dr.Boom is good too, especially if they left your boombots alive and ticking. ;)

You can switch out any +8 mana cards for other high mana cards, but I don't recommend switching out Kelthuzad as he fits the mana curve really well after Boom.

Deathwing usually ends up being a dead card if the game lasts that long, so you might wanna replace it for something else.