Hearthpwn

This deck is quite hard to play, because it has a lot of different gameplans for the different matchups. But there are some general guide lines. 

If you think you are playing against an aggro deck, then you keep Doomsayer, Wild Pyromancer, Forbidden Healing, Consecration, Bloodmage Thalnos and Equality. If you are facing shaman you can consider keeping Aldor Peacekeeper to deal with Flamewreathed Faceless. If you get Baleful Banker in your opening hand against an aggressive deck, then play it on turn 2 to help combat the aggression.

If you are playing against Priest, then be happy it is the best matchup for this deck. Keep Hemet Junglehunter, Baleful Banker, Bloodmage Thalnos, Acolyte of Pain, Witchwood Piper, Aldor Peacekeeper, Holy Wrath and perhaps Doomsayer. Do not keep double Aldor Peacekeeper only keep a single copy. If you have both Wild Pyromancer and Equality, then you also might want to keep it. If your on the coin and you have Hemet Junglehunter, then consider holding on to the coin to play Hemet on five unless the coin is vital for another play. The way you beat priest is by having both Baleful Bankers and Holy Wraths in your hand and then reducing them with Emperor Thaurissan and thus making you able to play all 4 in one turn. Then you draw/destroy your deck with your carddraw and Hemet Junglehunter and then you either let your opponent reduce your life total to 10 or you do it yourself either with Alexstrasza or fatigue, then you play your 0 mana Molten Giant, then you play Baleful Banker twice shuffeling 2 Molten Giants into your deck, then you Holy Wrath twice for 40 damage. If you have not drawn both Baleful Bankers, when you have Hemet Junglehunter in your hand, then play Hemet Junglehunter anyway. Then you are just going to have to reduce your opponent to 20 life and then kill him with one Holy Wrath. This has it advantages, while you do not need emperor to play one Molten Giant + Baleful Banker + Holy Wrath. An easy way to get your opponent to 20 life points is which Alexstrasza, but be careful, while the priest can heal out of range and it leaves you with one less way of reducing your own life total. Even though this is the case it is still right to Alexstrasza your opponent in most circumstances, if you have destroyed one of your Baleful Bankers. Remember you can also reduce your life total by drawing when you are in fatigue.

If you are facing a deck that can gain a lot of armor, then your in trouble and you might want to consider just going for a lucky kill early on with one of your Holy Wraths. Especially if you are facing Druid, while you will never be able to pull of your combo, because they kill you with Malygos, before you can get out your Molten Giants. 

If you are playing against King's Bane Rogue, then you should go for the same game plan as if you were facing a priest. You should either try to pull of the full combo or the combo only revolving one Holy Wrath and one Baleful Banker. But if they get lifesteal on there weapon then it is often your best bet going for the full combo, while they can heal of of range of one Holy Wrath + Molten Giant quite easily, with the massive life gain the lifesteal King's Bane provide.

If you are facing a mage, then you should always keep Wild Pyromancer, Consecration, Equality and Doomsayer, while you are going to need it against Tempo Mage. If you get a Baleful Banker in your opening hand against Tempo Mage play it on turn 2 to help deal with the aggression. If you are facing a slower mage deck, then you should consider going for an early win with Holy Wrath, because the combo is useless, when they get an Ice Block into play. If you want to improve this matchup then you should cut Marin the Fox and at a Secret Eater instead.

Card Choices:

The card in this list that stand the most out is certainly Marin the Fox. To be honest you are probably also better of cutting him for a Loot Hoarder, a Secret Eater or maybe Lay on Hands. The reason I find him useful is because the treasure, which draws 3 cards and reduces their cost to zero is extremely good with molten giant, while it allows you to play molten regardless of your life total, which is very useful in most matchup. Also the one which draws a cards and fills your hand with copies of that card, can be very useful, which Emperor Thaurissan, Holy Wrath and Baleful Banker. It is also easy to kill the chest with Wild Pyromancer/Consecration + Equality. 

One thing i have had happen a few times is that i Alexstrasza my opponent and they do not kill my alexstrasza. In that case you can shuffle to Alexstraszas into your deck either with Brann Bronzebeard + Baleful Banker or 2 x Baleful Banker and then double Holy Wrath for 16 damage. This of course only works if your deck is empty.

I could go into more detail about how to play this deck. But there are so many curcumstances to account for and every match is different, so i think the best course of action is to just play the deck and learn to adapt to each situation. 

I have played many games with this deck and considers myself to be quite skilled with it and i am only getting around a 40% winrate, so do not have that high expectations for this deck. The highest rank I have achieved with this deck is rank 8 and considering I have been Legend quite a few times then it is not that impressive. So if you are looking for a rather poor, but very fun deck, then this is the deck for you :)