Hearthpwn

Hello, this is the Deck I killed Kel'Thuzad today.

I will edit a few explanations for several cards, how and why to use them. Also keep in mind I write this Deck with a few writing mistakes because I want you to finish him as soon as possible ;-)

First of all we have 2 Parts of Kel'Thuzad. The Aggro-Part were he nukes us every Turn with 3 Dmg and makes Weapons useless and he plays several Early Minions combined with nukes to clear the Field. The plan is also to aggro with cards like Zombie Chow, Argent Protector and Knife Juggler and stall with Deathlord and Aldor Peacekeeper. IMPORTANT HINT: Use always Heroability on turn 2 because most likely he will destroy the "Guy" with a Frostbolt and enables us to get Boardcontrol on Turn 3 with Deathlord or Knife Juggler, depending on what we have. Also keep in mind to trade as best as possible. Attack minions with minions and then protect them with Divine Shield for the Enemy Spells wich deal a lot more Dmg than a Minionhit would (Frostbolt 3, Shadow Bolt 4). If you have Deathlords out, you can start going in the Face to rush his Armor down but only if you can be sure your Deathlord won't die next Turn but on some point you have to rush his Face because you can't affort to take more Dmg through the Heroability.

The best Scenario is a very full Board on Turn 5+ with 2 Deathlord and a few smaller Minions likeKnife Juggler,Argent Protector, bringing him to 0 Armor. Keep in mind to play smart enough, that damaging him is your last action in your Turn because your turn is automatically over after you kill his Armor. 

After that he gets two 5/5 Guardian of Icecrown with Taunt. The best scenario would be to have Equality and Consecration on your hand. Trade your Deathloards in the Taunts, so he gets more Minions and then clear the Board with your E+C-Combo (but I did it once without suiciding my Deathlords in the Nerubians, so it's possible without this scenario). From now on you have to spam every Turn your Heroability and hope that he will "mindcontrol" it with his Heropower. If you are lucky enough you can stabilizise your Board and go on his Face + good trading. From here on now it's all lucky, because his Heroability is totally random but with a few Cards we can influence the luck to our favour. I'm speaking of Hogger and our Heroability which give us a huge chance to negate his Heropower.

Explanations:

Zombie Chow: Best Stats for 1 Mana and the Deathrattle won't affect Kel'Thuzad because he can't heal Armor.

Argent Protector/Knife Juggler/ Deathlord/ Aldor Peacekeeper: Overall good Cards to survive the Early-Midgame and push Dmg.

Molten Giant: Because of the 3 Dmg we take every Turn we can play a free Giant (or for 3-4 Mana) in Turn 5+ and enables us to crush his Armor or gain Boardcontrol back. I recommend going for the Armor because 8 Dmg are 8 Dmg.

Hogger is the Keycard here. With im in Lategame and your Heroability the chances he wastes 8 Mana for a "Guy" or the summoned "Gnoll" are very high. With this summoned smaler Units each turn you can keep your bigger Minions alive and each turn you have a Minion more which enables you to push more Dmg to his Face.

Sen'jin Shieldasta/Sludge Belcher: Solid Taunts who trade well. Especially in LateGame if you are lucky you can straight go face, while Kel'Thuzad has to attack your Taunts instead of you or your bigger Minions.

Stalagg/Feugen: Never had really use of these guys and I considered them to be replaced by 2 Doomsayer to clear his 5/5 dual Nerbian Taunt turn. Can be replaced by something you like and think it fits. In my succesfull runs I really haven't had any use of these guys. Keep in mind you have the chance of getting 1-2 Thaddius out of it, when you have Stalagg and Feugen on Board and he clears with Twisting Nether both of them in the same turn or just 1 of them. You get at least 11 Dmg out of it, but the chances that happens are very low.

Guardian of Kings: The Heal is important and statwise they trade well with the 5/5 Taunts. Must have. Far better than Lay on Hands, because you profit also from the MinionBody.

Hammer of Wrath: is more likely a trading card. Don't go for face with it. Later you can simply use them to kill the Minions he steals from you.

Blessing of Kings: Keep it until you have a stable board. Pump a Minion when you minimize the Chance he can "mindcontrol" it with his Heropower. If you have 3+ Minions out I would pump the strongest. You have to gamble, that he takes your tokens and if you are successful you have at least 8 Dmg won. If you draw it in your Early Phase, pump your Deathlord.  

Avenging Wrath: With Equality we can even in Lategame comeback in board presence. Alternatively 8 Dmg to the Face is also a nice usage.

I hope this Guide helps you a bit. The main thing is perseverance and luck. I tried at least 5 times with this deck and had a lot of luck with his Heropower in the End. Keep on going you can do it aswell :-)