So heres my opinion on the cards.
Ironcliffe Heart: Pretty bad. What would you target this with in a typical game? Winblade Adept? Silverguard Knight? Azurite Lion? Auryn Nexus is a thing, and this just seems like a more situational and clunky version of it.
Nature’s Confluence: Can’t say much about it with what we know right now. But probably a meme card.
Arcane Devourer: How good is a 1 mana 8/4 at 8 mana is, truly? Darkspine Elemental has more power then this but saw only minor plays and this card is no less situational then Darkspine.
Battle Panddo: Put a Deathstrike Seal on this and it will wipe the board. Without the seal, the 1 dmg fullscrean aoe still provides great utility, and this card paid no stats* for it.
Pantheran: It’s kinda comparable to MECHAZ0R. Instead of putting 5 suboptimal cards into your deck, you put 2 good cards and 2 garbage cards into your deck. The reward isn’t even that good.
Winter’s Wake: You need to get 3 walls with it, else it’s a worse Spectral Revenant in a faction with no healing options. It’s not likely that you can have 3 walls alive at 8 mana.
Inquisitor Kron: It’s a 5 mana 4/6 + 2/2 with great texts on it. It’s pretty good.
Z0r: More consistency for mech decks. Will probably see plays in mech decks.

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KRON
I can’t wait!