Hearthpwn

Hit Legend with this list this morning. Here's a quick guide:

Playstyle: Build a wide board and smash face. Draw ridiculous amounts of cards and keep the pressure up.

Mulligan:

Always keep Malchezaar's Imp, The Soularium, Darkshire Librarian, and Flame Imp.

Keep discard-lovers in your hand if you have Darkshire Librarian or Felstalker.

Keep Felstalker if you have discard-lovers in your hand.  Keep Frenzied Felwing if you have Felstalker, since his 4 attack discounts Felwing to 0.

Against aggro, keep Voidwalker to protect important minions.

If you have too many 2-drops that discard things, pitch a few and try to find a discard-lover.

Matchups:

Demon Hunter (6W-8L) - Usually a bad matchup. Odd Demon Hunter's hero power invalidates all of your early game except for Malchezaar's Imp and Voidwalker. If you can't stick a board, you lose.

Mage (16W-3L) - This deck demolishes Quest Mage. They can't do anything about your early game and you just steamroll them.

Paladin (4W-1L) - Positive against Mech Paladin. You get the board faster than they do. Unless they draw the nuts or make a giant Zilliax, you're good.

Priest (4W-0L) - Positive matchup. Reno Priest really struggles to survive the onslaught.

Warlock (3W-6L) - Very bad matchup. A lot of Warlocks run Sacrifical Pact, plus cheated Voidlords crush aggro.

Warrior (0W-3L) Very bad matchup. It's either Odd Warrior or Pirate Warrior and this deck loses to both. I didn't play against any, but I think this deck would lose to Galakrond Warrior as well.

I have insufficient data on Druid, Hunter, Rogue, and Shaman.

Card Choices

Core cards: Malchezaar's Imp, Flame Imp, Soulfire, The Soularium, Darkshire Librarian, Felstalker, Kanrethad Ebonlocke, Tiny Knight of Evil, Silverware Golem, Fist of Jaraxxus, Frenzied Felwing, Doomguard, Hand of Gul'dan. If you are missing any of these, the deck will be significantly weaker.

Clutchmother Zavas - Often played as a 2 mana 4/4, but slow. Debated cutting her for another Voidwalker. I don't think the deck would suffer if you did.

Voidwalker - A tech against Odd Demon Hunter to protect my 2-health minions. Worked well when I played it.

Crystalweaver - Win-more card for when you build a wide board of small demons. Felt okay, but if you're losing he is useless.

Nightshade Matron - Surprisingly felt like one of the weaker cards in the deck. By turn 4 you are usually looking to close out the game, not play a Rush minion, but there are really no better options. I face mostly Demon Hunter, Mage, and Warlock, which this card isn't very useful against. She killed a few Flamewakers though.


Why don't you play X?

Lakkari Sacrifice - Because it's really bad.

Kobold Librarian - Tested. This deck has more than enough draw and he doesn't synergize with the deck.

Expired Merchant - Tested. Just fills your hand with Hand of Gul'dans or Doomguard, neither of which is ideal. 

Imprisoned Scrap Imp - Tested. This card is horrible in this deck. I saw it run in another popular legend list, but every time I drew it I just wished it was anything else. It's slow, and you can discard minions that have received the buffs. The games are usually over by turn 6, so this is just way too slow.

Howlfiend, Reckless Diretroll, and Lakkari Felhound - I did not test these cards. If you want to test them and they're good, let me know. But they seemed bad.

High Priestess Jek'lik - Tested. Slow, fills your hand, not even good against aggro which is why you'd be running her in the first place.

Maeiv Shadowsong and Loatheb - Tested both. Maiev is good if you're hitting a lot of Warlock mirrors, but isn't good anywhere else so I cut her. Loatheb is best against mage, which this deck already demolishes.