Hearthpwn

Welcome to the most consistent Warlock deck out there. In case you can't see the brilliance of this deck, I will go over each card.

Brann Bronzebeard is so synergistic with the cards in this deck. I mean, just look at all those Battlecries! The value! 

Both Succubus and Soulfire are in this deck so that you can get the maximum value out of Fist of Jaraxxus. Deal 4 damage for 0 mana? Sign me in. With the boost from Brann, you Succubus will increase the odds of discarding a Fist of Jaraxxus and that's simply amazing. 

Wisp and Murloc Tinyfin are cards you can empty whenever you want so you can increase the chances that you'll discard Fist of Jaraxxus. Aside from that, they have 2 stats for 0 mana. What amazing value! Feel free to play them early on even when you don't have a Fist of Jaraxxus in your hands to gain board control early. 

Flame Imp, Felguard, and Pit Lord were put in this deck because nowadays, a lot of Warlock decks have demon synergy in them so this is obviously the right move. Not only that, all three of these cards have Battlecries, so they work really well in tandem with Brann Bronzebeard. They've really helped make this deck perform more consistently, and I don't think a perfect win/loss record would've been achievable had it not been for these cards. 

Sacrificial Pact, Demonfuse, and Sense Demons are all demon synergy cards that serve to help this deck perform better. Sacrificial Pact heals you for a whopping 5 points for 0 mana. That's amazing value for 0 mana, and all you have to do is sacrifice a demon which you have plenty to dispose of. Demonfuse will make your demons really powerful. The fact that it gives your opponent a Mana Crystal is actually a blessing in disguise. Play it against a Druid, and suddenly their Astral Communion gives them less Crystals! Similarly with Wild Growth and Darnassus Aspirant, giving them extra Crystals with your own cards means they'll have less turns before they reach 10 Mana Crystals, at which point those two other ramp cards are less useful. Clearly, this Mana giving mechanic is a hard counter to Druid. Lastly for the demon synergy cards, Sense Demons was added because decks really do need some draw power. 

Arcane Golem was added for a similar reason to Demonfuse. Except because of Brann Bronzebeard, Arcane Golem can give 2 Crystals! That's just way too amazing to pass up.

Ancient Shade and Hungry Dragon are 4 cost minions with amazing stats and with Battlecries to boot. Seriously, them being in this deck is just unfair. 

I know what you may be thinking. That this deck needs a bit more cards to help survive. Don't worry, I thought ahead. That's why I put in Majordomo Executus so that when you're on your last legs, you can get your health back up to 8. Or if you feel like playing mind games, reduce it to 8. As for why I didn't put in Jaraxxus, he's to busy punching the board with his Fists of Jaraxxus to be bothered with it. 

With this deck, I hope you guys can also achieve a perfect win/loss ratio of 100% losses like I did. Perhaps someone will be able to go 100% for an entire season. Who shall accept such an enormous challenge?