PcGamer has the full breakdown for Shimzar as well as having exclusive reveals! Check it out here:
PCGamer Shimzar Spoilers card reveals+Info
WHAT THE —?! This cards are… I have no damn words. Ironcliffe heart?! Arcane devourer?! PANTHERAN?! and winters wake… ooooh… In good ol’ mogwai’s words: MY D—!
Jokes and hype aside, this cards are awesome and I just hope z0r will never see play. Also, I’m glad to see more love for replace decks. I can’t wait, damn it! 
I finally get my magmar card… But the sheer amount of cards being introduced simply blows my mind… increasing the collection 20%…dear god…
Also several of those cards look insane.
I am sooo hyped man…
Looking forward to Kron and Devourer…the only things i can savly say being used by me…
Winters wake is just crazy…maybe it will work but i doubt it…its like Voice of the wind and as we all know…it doesnt work so well.
(BUT WE NEED MORE MAGMAR SPOILERS DAMN IT!)
The thing i am most hyped about is Hydrax wich is in the Promotion art…dont know but i just love those kinda disigns…
You shoud have know by 13 card for each faction…
ALTHO WHERE IS MY 8 MANA MAGMAR SPELL?!
AND I WANNA KNOW WHAT DREADNAUGHT DOES…
Magmar doesnt get hype-love man…and pls dont tell me Magmar gets 8 mana summon 9 rendom eggs…pls…
Battle Panddo + Deathstrike Seal…
Oh, god…
ALTHO WHERE IS MY 8 MANA MAGMAR SPELL?!
AND I WANNA KNOW WHAT DREADNAUGHT DOES…
You took the words straight out of my mouth.
BTW whats that weird Vetruvian worm in the Art?..looks weird to me…wonder if thats a Battlepet or now…
Also, that birb. I want it. I like birbs. (It’s already my avatar in game. Will build deck around it)
So much HYPE!!!
Arcane Devourer looks completely nuts! Reavers and Revenants for one mana? Fuckin’ yes please!
Winter’s Wake looks similarly nuts, and the battlefield imagery would be amazing, where the terrain itself joins nature’s bloody war!
That, and Inquisitor Kron seems almost busted! Fireblazer will probably need a buff to stay competitive.
looks like abbysian swarm decks will be so dead, not even nether summoning can revive it
I haven’t seen a good Magmar card yet but Kron is good enough for me.Going second flash Kron on the mana tile use Amp and replace.Watch the other person die inside
One general trend I find interesting from the reveals so far is all the high-cost stuff combined with more removal. Could be wrong, but I sense a general desire to lengthen games and increase their complexity. I’m not sure how I feel about this honestly, short games are a draw for Duelyst. Plus I only know how to play aggro right now. 
Yeah, it’s a shame. I’m still hoping they’ll reveal at least one card that helps those poor wraithlings survive the amount of aoe this expansion is about to drop on them.
Nature’s Confluence sounds broken as all hell. Inquisitor Chron is awesome.
The only thing that really saddens me is that vanar big spell is godawful. And the new vet minion also seems a bit underwhelming, though it can actually be super impactful if you proke the effect.
Okay, let’s give this a go, I’ll try to make it brief. Have in mind these are just very bold predictions and I will definitely be wrong about some if not all of them. After all, there isn’t nearly enough info to properly evaluate the cards and even if there was, you need to see the card being played first to see how it actually performs. Some people obviously don’t agree and just like stating their predictions as facts 
z0r - Again, I don’t know how pets work so I can’t properly evaluate the card. However, I do love the effect it has and I will probably play it in my mech decks just because of it alone.
Ironcliffe Heart - Not much to say here, the card just looks good. Best way to use it is after you damaged a friendly low cost minion but it can be also just be used to upgrade a minion or get a provoke when you direly need it. Sure you need a minion to stick on the board for it to work but that isn’t too hard too do in Lyonar. Just a solid card.
Natures Influence - I don’t have a fucking clue. It does seem fun so that’s something.
Arcane Devourer - I love this one. Use DarkSac on 6 mana and summon an 8/4 and a SpecRev, Vorpal or whatever large minion. It doesn’t sound that hard to pull off. And even if isn’t as easy to pull it off, value wise the card is pretty awesome. Only requirement is having a big minion in the hand to use it with and some HP or board ensuring you don’t die the turn you play it.
Battle Pando - It’s basically a 3 mana 3/4, but better. The card is simply good on itself. It’s far away from the fox level but then again, everything is.
Pantheran - Not a clue. Is running a deck with 9 wishes worth it just so you can place multiple 0 mana 6/6s? Is it even reliable? I don’t think so, but I like the idea and I’m sure decks including it will be tried out. The card is actually very similar to mechaz0r.
Winters Wake - It’s pretty hard to have enough walls up on 8 mana for this card to be good as of now. Maybe we’ll get more walls and various other cards that make it easier to keep them alive, I don’t know. This card is really hard to evaluate.
Kron - Fireblazer powercreep, this actually bothers me more than it should. That aside, the card looks good on it’s own and will probably be run in such way. I don’t think it’s effect is strong enough to make replace decks viable though. But I will be really happy to be proven wrong on this one.
By the Sisters, first Sunforge Lancer, then Sky Phalanx, now Ironcliffe Heart? I love you too, CP <3.
I have a personal affection for Inquisitor Kron in particular; just can’t resist that design!
Edit: Underneath the spoiler for Ironcliffe Heart:
However, Counterplay told me that Shim’zar will also come with a nerf to Divine Bond, raising its mana cost from 2 to 3.
IT’S HAPPENING DIVINE BOND IS GETTING NERFED!
Just let me get one thing straight: Ironcliffe Heart is broken with DBond. I don’t see how raising its mana to 3 would solve anything.
Transform means that it gets Rush. Now all what lyonar needs to do is swarm the field with low cost minions so that you have a better chance of having at least 1 survive, and next turn transform the closest one to the enemy to an Ironcliffe, DBond it and hit for 13 for 7 mana or more if you Roar it, attack with general or have more minions on the field. Without mentioning that you can transform a cheap minion into an Ironcliffe and summon another Ironcliffe in the same turn at 9 mana. Now deal with 2 Ironcliffes or lose the next turn to the clearly broken Divine Bond.
And old Third Wish was nerfed. Please…
Yeah, his art looks too cool! 

If I had to rank these cards, I’d do it like that:
1: KRON: Absolute beast, if left unchecked, game is pretty much over on the following turn
2: PANDDO: joining Urf Sister for crazy combodamage effects, now Songhaï mains won’t have anything to be complaining about anymore since they got their own Earth sister.
3: IRONCLIFF HEART: Cycle a body or a minion that does not do the job anymore. Much easier to pull off DB comboes as well. Just needs 7 mana as off now cause DB got a small nerf.
4: PANTHERAN: it all depends on how (if they even) rework Scion’s third wish.
5: Z0R: doesn’t boost Mechaz0r progress, piiful statline, not the best way to introduce us to Battle Pets I guess.
6: ARCANE DEVOURER: it definitely needs to be tested and some interactions found to have a definitive word about it but, yeah, the stats are that bad…
7: NATURE’S CONFLUENCE: Cmon… second card revealed for Magmar and it’s this bad? Will be joining Mind Steal alongisde the unusable epic cards.
8: WINTER’S WAKE: Absolute trash D:, Walls don’t survive a single turn without dying, do you really expect to land this card with the actual state of wall generating cards? I wonder how Mogwai will overereact about it this time xD
I think the first 2 cards are WAY above the others in terms of usability. I really hope Pantheran will be playable because the art is so kickass… I’d be really sad if I couldn’t play it in a competitive deck.