Hearthpwn

Go for it. I just threw this together to support my idea that Druid would make for a good Reno class. Highlander decks need a lot of refinement, and I did not and do not expect  any highlander deck to be perfect upon first iteration. 

Actually I was thinking about running The Black Knight and some taunt activators as it used to be a potent thing in druid. However, unless the rest of the deck supports the cards you use, it will just come out feeling clunky.

I removed it for the same reason you wouldn't run Auchenai Soulpriest + Circle of Healing in a highlander priest. You just don't want to include cards which are sub-par on their own in a highlander deck unless you have ways to either draw a TON of cards consistently, or can fetch out the combo components. In Hearthstone, you can do neither. In magic... both, which is why it works there. But for the most part, I would try to avoid two card combo's in a highlander deck wherever possible, instead preferring just to run a deck which is just... mono-decent. It's the only way to obtain consistency. The deck still seems clunky to me, but I did my best to emulate the curve and removal content of midrange druid decks while still using cards which are simply good. Maybe not T1 good, but this is a highlander deck, where we are basically playing arena in constructed.

I'm almost wondering if i should abandon some of the "mono-decent" line to turn the deck into more of an outlast deck. Adding cards like Healing Touch and Antique Healbot could help the deck survive into the late game. My only qualm about that is that this highlander deck by nature will have no consistent way to close out the game other than board control. And board control is best obtained by taking it early and never giving it back. Compound this with the fact that this deck is light on recovery mechanics (on top of being a druid deck, which only compounds the problem) and I am really loathe to remove anything which might obtain me board control early in the game.

Still, I chose druid because it seems like the best class to play mono-decent with so... heck, why not.

What you really need in a highlander deck are cards which perform nearly the same function but which are different cards. To me, redundancy seems to be something which druids have in spades.

Maybe something like:

Re-read the OP. 25% chance that if you run two copies of the same card in your deck, they will both be in the bottom half of it.