Hearthpwn

Getting destroyed by much faster aggro/token/face Demon Hunters (which is all of them). Skip this deck for now, maybe try it again in a few weeks.

But doesn't zephrys not look at your hand and thus doesn't give you doomhammer most of the times?

 Yeah getting Doomhammer would definitely need a lot of set up, it'll probably have to something like having 10 mana and pressing hero power, using the 0 mana slice card and also using shadow strike so you have around 4-5 attack and also end up with exactly 5 mana, Zephrys is way too retarded, if you want such an specific card you definitely need to set him up perfecty. Also a taunt just cockblocks you hard. 

Doomhammer is actually offered more often than not and I can't take credit for the idea. Firebat initially created a similar deck with same potential Combo, so I've just refined his list. But you talk about the Combo like it's an impossible thing to do and I think that you'll realise that it's quite easy with all the cheap draw cards etc. I do however think I need to add Twin Slice so thanks for pointing that out 😁👌

Zephrys is too retarded, trust me, I've been fucked by many times by  him giving me cards that make no sense, At least you have to set him up at 5 mana to have a chance of getting the doomhammer and then clench your butt cheeks. Also if this combo becomes a thing, everyone will run Ooze or Harrison and there's nothing you can do to prevent it as it's a 2 turn set up, way to easy to counter for it to be a real thing once the meta settles.

You definitely need to fit a Chaos Nova in here somewhere. Personally I'd swap out Sightless Watcher. 

I think the list I made leans more towards being a Highlander Hunter than a Highlander Mage. That being said you could play it in there and maybe cut Sightless Watcher or some 1-drops if you want a control type deck