Tricky to evaluate. It's a Spellburst trigger, so there's that. It also discounts ANY spell, not just the one you Discover, so it can help get some stuff out. Whether it'll actually work or not is another story.
It's a new kind of egg. Not as strong as Nerubian Egg or Devilsaur Egg, but not as weak as Serpent Egg. I'm sure it will see play of some kind, but I'm not sure what deck it will fit into best. It's also a beast, so it has synergy that the other eggs don't have. Looks solid!
The student life flavor across the set really makes me chuckle : " The font of the arcane gives nearly limitless access to power and energy! But it can't keep you awake, for that we still use coffee."
It's a combo disruptor, but not by any means an auto-include. It does seem quite dirty to just be able to mess with your opponent's hand like that, though.
New Priest Spell - Power Word: Feast
Turn 1 [Hearthstone Card (Frazzled Freshman) Not Found]. Turn 2 this card... OMG!
New Priest Spell - Initiation
Need to hit a 4 or less health, since Priest it's really bad at chipping away minions. Not really a fan of this one.
New Rogue Minion - Shifty Sophomore
Good on curve, cool and valuable effect - geez, this set is on fire!
New Druid Spell - Nature Studies
Tricky to evaluate. It's a Spellburst trigger, so there's that. It also discounts ANY spell, not just the one you Discover, so it can help get some stuff out. Whether it'll actually work or not is another story.
New Hunter Spell - Overwhelm
That art... :D
New Hunter Spell - Overwhelm
Deal to damage to a minion for 1 mana is already solid, so the fact that it has an upside that linearly increases means this has a lot of potential.
Beasts and Hunter go together so seamlessly, so this is bound to give Hunter another solid removal tool.
New Demon Hunter Minion - Soulshard Lapidary
OP
New Mage Minion - Wyrm Weaver
Mana Wyrm, eh?

New Hunter Minion - Bloated Python
It's a new kind of egg. Not as strong as Nerubian Egg or Devilsaur Egg, but not as weak as Serpent Egg. I'm sure it will see play of some kind, but I'm not sure what deck it will fit into best. It's also a beast, so it has synergy that the other eggs don't have. Looks solid!
New Neutral Minion - Plagued Protodrake
Great Arena card. Great discover card. Not much else to say. Too slow for constructed to actually run in your list.
7-cost minions aren't even that desirable, so this isn't even that promising.
New Neutral Minion - Keymaster Alabaster
Awesome wild Fatique deck card.
New Neutral Minion - Voracious Reader
Ridiculously strong card--Jeeves but better. Aggro/Embiggen/Pirate Druid in wild just got a little scarier?
Hyper-aggro lists will love this card, and I expect to see this in aggro lists that lack card draw.
New Mage Spell - Cram Session
The student life flavor across the set really makes me chuckle :
" The font of the arcane gives nearly limitless access to power and energy! But it can't keep you awake, for that we still use coffee."
New Demon Hunter & Warlock Minion - Soulciologist Malicia
I'm not even sure it's a must-have for the Soul Fragment decks. It's not BAD, if you open it, but not an auto-craft either.
New Demon Hunter & Warlock Minion - Spirit Jailer
Soul fragments decks seems to be good.
New Neutral Minion - Keymaster Alabaster
Coin + Glide this is not meta breaking, it's just a meme. Much more relevant on Wild, but still...
New Priest Spell - Initiation
Initiation : The things a murloc's gotta go through to graduate from Scholomance…
New Demon Hunter Minion - Star Student Stelina
It's a combo disruptor, but not by any means an auto-include.
It does seem quite dirty to just be able to mess with your opponent's hand like that, though.
New Warlock Minion - Boneweb Egg
More eggs! Yes!
New Demon Hunter & Warlock Minion - Spirit Jailer
Pure and simple, an auto-include if you're playing with Soul Fragments. Even if you're not, 1-drops don't get a lot more solid than this.
New Neutral Minion - Intrepid Initiate
New Shaman Spell - Molten Blast
More evolve shenaningans. Sure, why not? Better then when Shaman had no identity at all.
New Neutral Minion - Keymaster Alabaster
Really strong idea, but probably pretty weak in card in practice.
Feels like it should be a Priest card, and I suspect it won't see much play in standard.
Nevertheless, I look forward to making more Thief Priest deck lists using this card.
New Demon Hunter Weapon - Marrowslicer
Curves right into Soulshard Lapidary. Boom, you're hurtin'.
New Demon Hunter Minion - Soulshard Lapidary
Just wish there was more soul frags enablers.