Hearthpwn

It is aggro deck I hit legend in one week from rank 16. The Key is to mulligen for cheap creatures and attack to face. Change only when it is really valuable or you need to destroy some stuff like knife juggler. Dont mind that your oponent will take over the board, because you got doomhammer and enough lightnings to finish him any way. You play 4 cards that will clean your overloaded mana, so it is needed to always count for next 1-2 turns. 

From Sir Finley i found the best is warlock ability, because it ussualy draws you some bolt which is more damages than other abilities.

Possible changes are Lightning storm for Elemental destraction which is better but when you have no Eternal sentinel or lava shock is hard to have 5 overload.

And i used to play just one Eternal sentinel and two flame jugglers.

 In case of question, send me message. And as proof I am telling truth, pics below