Hearthpwn

For Heroic: just make a Warlock deck with Mortal Coil (or any other card that deals one damage) and Defile. Mulligan for these two cards and wait until he has at least two Icky Imps on the board. Deal one damage to one of the Imps so that there is one Imp with one hp and one (or more) Imps with two hp. Now cast defile. This will start a chain of infinite defiles until the boss is dead.

First try, brilliant idea.

This deck is utter trash. LK kills Banshee is she draws too many. They must have hot fixed it. Do not waste your time. Trash deck.

It worked but I have played more than 50 games! Also I have made few card changes due I'm missing few cards or I didn't like 'em: -2x [card]Enter the Coliseum[/card], -1x [card]Brann Bronzebeard[/card], -1x [card]Truesilver Champion[/card], +2x Unstable Ghoul, +1x [card]Forbidden Healing[/card] and +1x Mindbreaker, but it didn't work so I would suggest to add Violet Illusionist instead of Mindbreaker.

Thank you!!! 3rd try but it was for my mistakes that I milling my self :P

By the way I carft Keening Banshee × 1 it was more easy

I didnt search for decks because i want to discover by myself but i also did a mill paladin it has of course many cards like this but i dont use lifesteal cards, truesilver zombie chow, explosive sheep or healbot. i use tempo making taunts off cant atack minions, doomsayer humility and freeze minion. 

https://youtu.be/1MYBH4oaeEc

Took me like 3 tries. This deck is actually way better than murloc and DK combo, as with all the explosive sheeps and doomsayers you see it's actually working. Getting Banshee with Humility is not that lucky. 

Made an account just to say thanks for this deck.  Also, to give you a name for it: MILLLK

100x thank you! Tried other decks, could not get the RNG to work for me, got this on the second try, would have gotten it on the first try if I had not of messed up. 

Awesome deck mann