Hearthpwn

Note: This guide is somewhat outdated in consideration of some of the cards mentioned in it. 

Hehe, there is a method to my madness. 

With KaC came the possibility to truly cheat large minions into play for less than their cost. This deck runs Skull of the Man'ari to take advantage of this strategy but also Carnivorous Cube and Voidcaller. So the main strategy of this deck is to play big demons more or less for free and then copy them in different ways, which can make for quite lethal play. 2x turn five Mal'Ganis isn't always that easy to counter, and if they aren't countered your opponent will have an even harder time to counter four of them next turn, if you have Carnivorous Cube and Dark Pact on hand. Add Spiritsinger Umbra and Sylvana's to the mixture of deathrattle cards in this deck and you're in for some truly wild combos. 

This deck also contains some healing, but try to be at least a little cautious with your tapping - especially against opponents that have the power to quickly drain your life before you can establish a threatening board presence. But you will probably get the feel for it at one time or another.

This deck has strong late game finishers, N'Zoth, the Corruptor and Bloodreaver Gul'dan. Mind that if you play N'Zoth before Gul'Dan you probably will taint your pool of demons with Voidwalkers.

Mulligan, mulligan, mulligan.

Generally, you like going second because of Coin+Skull turn four. However, you most often want to keep Skull and some big demons or just heavily mulligan for Skull, if you didn't get it. Kobold Librarian is generally good to keep as it draws cards for you for one mana. Against aggro you will probably want Spellstone + Defile + Hellfire or Voidlord and some kind of way to "cheat" it to the board and some boardclear. You get the point. 

If you play against arcehtypes that typically do a lot of damage, try to always keep or mulligan for a Doomguard. You will have to hardcast this minion a lot of games in order to win them. For example, Doomguard is good to keep against Secret Mage, Kingsbane Rouge and Big Priest. Another good card against Big Priest is Sylvana's. Imagine the feeling when you steal their rag and then successively filling up your board with him... hilarious and the Big Priests most assuredly deserves it ;). 

What are the Threats?

Cards such as Poison Seeds i.e. cards that destroys your minions, most often aren't that much of a threat because of N'Zoth, the Corruptor and Bloodreaver Gul'dan. What you should watch out for is devolving cards and weapon-destroying cards, if possible. But even if your opponent do have devolve on their hand, it might not matter if you have a board filled with, e.g. Voidlords. Devolving 9-cost cards can have... let's say... quite horrifying results for your opponent. On the other hand, you will loose a lot of demons, which otherwise could've been resummoned through e.g. Bloodreaver Gul'dan. 

Another thing with this deck is that it is based on RNG. Most of the time card draw isn't a problem (if you aren't VERY unlucky). If you want to lower RNG in this deck, remove Prince Taldaram and some other card and add 2x Sense Demons.

Winrate

-Statistics will maybe eventually be inserted.

Credits

deepfear

PS. Any thoughts are appreciated. Feel free to leave comments below!