Hearthpwn

Won at 6th try. Dreadsteeds are worth to buy :)

Works on my first try. Combo Knife + Dreadsteeed is OP!

Thanks man, that was the worst boss ever.

3rd try. This deck is great! Well worth the dust I used on Dreadsteed! Thanks a bunch!

A warning for people: He will use his Sparring Partner to give Kel'Thuzad taunt. Once that happens, the AI is free to attack and kill him. He also played his two North Sea Kraken to damage my Kel'Thuzad behind taunt minions and killed it.

GREAT! First try, manage the number of proper Dreadsteed (room for 1 kel and 1 taunt out)of course try to save Siphon Soul  if you are in serious threat.

First Try:>

Great Deck. But I only got 1 Dreadsteed ,so i replaced it with Deathlord

 First Try:

2nd try to win,thx for posting

THANK YOU!

That boss was so damn annoying! Got him 1st try with this deck

Used this deck since I lacked dem Dreadsteeds.
Perhaps I was lucky.

It works, but it indeed requires a huge amount of luck to get the KT+tank combo...

...without the boss using Brawl or Enter the Coliseum.

holy crap! it worked first try too! thanks

This was a great idea for this fight... works perfectly. I did it with the same deck except -Dreadsteed and +Deathlord. 

That being said, the Dreadsteeds were amazing, especially when used with Knife Juggler and Kel'Thuzad. Thanks for the deck, works perfectly!

- 2x Sacrificial Pact The health isn’t really needed

- 2x Demonwrath Found it bad in most cases

+ 1x Bane of Doom If you lucky enough you can get a big target for his weapons and Enter the Coliseum

+ 1x Siphon Soul Great for the big taunt minions

+ 2x Ironbeak Owl Good against the buffed+taunt minions

Don’t overextend on the board as this boss uses Enter the Coliseum and Brawl. Try to bait them out with Dreadsteed and Haunted Creeper.

Sure. Mirror of Doom and Timepiece of Horror are great against Sentinel.

This was my last boss fight to get the LoE Card Back. Excellent deck as a starting point - thanks!

A few things to note for anyone who is interested:

• For me, this fight must absolutely be completed running as much Silence as possible. I was getting super frustrated when he dropped out anything with Taunt, particularly Lord of the Arena which he then went on to buff with Blessing of Kings. Seriously. The worst is when he played Tirion Fordring though. To counter all of this, I subbed in 2 x Ironbeak Owls and 1 x Spellbreaker.
• As a die-hard Warlock only (on the ladder) player, I am somewhat ashamed to admit I don't own all the Warlock cards. So, no Dreadsteeds, No Bane of Dooms, and (gasp!) no Siphon Souls for me. I subbed in 2 x Imp-losion which are very handy to combo with Sacrificial Pact if you are running low on health.
• I also took out Baron Rivendare and the Demonwraths and added 2 x Echoing Ooze.

Thanks again.

i used Void Crusher and 2xSiphon Soul... i feel having removals is pretty good

Worked on my 3rd try.  Had 2 knife jugglers and a dreadsteed and just kept on using dreadsteed to get rid of divine shield....mortal coiling it as well and using sacrificial pact to deal 4 damage at least per turn....besides the other minions on board.

Haha, Sentinel dropped Blingtron 3000 and he got Cursed Blade. He never wanted to attack my 1/7 so he kept holding on to it.

This fight is A LOT easier when he takes 2 damage per hit ;)

The main problem I had with this deck, and I don't think there is much you can do to get around it, is that whenever there was a joust I lost. I didn't win one. I mean, I know i got lucky and won my first try, but I can imagine it getting annoying.

This Boss is just a pain in the ass! Not enjoyable whatsoever..! Taunts + 3 Armor Smiths. 
Finally got him with this deck! Thanks a lot!