Wizard : Like this. Could be a 4/4 IMO.
Shredder : Too strong, even with the downside effect. 5/5 would be more reasonable.
Scorpion : Like this. But having that effect on a Taunt minion with only 1 attack could prove frustrating to play against, if it sees play at all. Can't really tell right now.
Guardian : +1
Dragonspawn : +1. What if you have less than 3 cards ?
Spirit : Think it might be a little weak. I would compare that to Summoning Portal, which is better than this (and still bad). You can safely up the Health to 6. Or lower the mana cost to 3.
Demon Hunter : Don't like having an effect when a draw happens like this. Juggernaut's bombs are fine. But this and Flame Leviathan are really a source of ... despise.
Myrmidon : Aight
Thresher : Aight
Blackrock : Good.
Behemoth : Anti-Shaman card eh ? Kind of like this alot.
Walker : Tasteful effect. Could maybeee up either Attack or Health to 5.
Wyvern : Err probably a bit too strong. Could prove really abusive.
Kodo : I like your effect, but it's rather powerful. Should add a constraint like : Devour a minion of same or lesser Mana cost. Or alternatively increase the Mana cost to 6.
Winterskorn : Interesting. Like this.
Neferset : Heyo, should reduce Health to 4 with such a strong effect.
Fel Orc : Shrug
N. Drake : Interesting effect. Would need to see it in action.
O. Drake : Hmm, could increase the Health or Attack to 5. That kind of effect isn't really as strong at that point usually, in comparison to your Quillboar for example.
B. Drake : Awesome.
Statue : NOt sure about this one.
Colossus : Think it's an all around way better version of Fel Reaver. Decks that would want this card the most will work their way to it too easily. This would be insanely pewerful, even if it's in BGH range and might be the only minion to be in its optimal deck.
General : 5/5 could make it really awesome. Like this.
Ozumat : Eh, I guess it's better than Kidnapper, but not by far. 2 Health would already be better.
Vashj : Like your analogy to her Mana Shield ability from Wc3 here. Really great.
Bladespire : Aight.
Bloodmaul : Interesting. Though there would really be no reason to play Frostwolf Warlord anymore :P. It's a win-win card, but I could see it being used in Token Druid decks perhaps.
Crypt Lord : This effect could be to be abusively powerful. Would have to see it played really. But i would suggest lowering to 6 Health.
Gryphon : 4/6 would still be weak, but acceptable.
Subjugator : 4/6 again would be better.
Mountain king : Aight.
Chimera : +1.
Magnataur : Might be on the weak side, but I like debuffs. Try 6/7.
Hakkar : Weakish, at that point you probably have better use for your Mana than summoning this minion, and resummoning it afterwards.
Tichondrius : YES.
Wyrm : Mages will love you. MIGHT be a strong enough to bring Freeze Mage back to stellar status.
Murozond : Interesting. Could lead up to some gimmicky yet novelty strategies. +1.
Tarecgosa : That's rather powerful. Like... extremely powerful. Just imagine a Mage playing this extremely hard to remove minion then following with Pyroblast x2 for 10 mana. That's 24 damage in one turn. 2x Mind controls would also be a pain. This is way too strong. A 8/8 dragon would already be more reasonable, if we want to use this word.
Flesh Giant : Interesting. Could work in a some sort of Fatigue Deck with Deathlords and thingies. Otherwise don't see much of a use for it. I'm not sure the Battlecry is really needed to be so punishing.
Frost Giant : Wuzzah Freeze mageeeeeee. Way too situational to be used at the moment, but alright.
Varian Wrynn : Hi ANDUIN's DAD. I take it it's an alternate Warrior hero (correct me if wrong)
Veteran : 3/2 seems more like it.
Elite : Hmm, i'm trying to figure out how good it'd be for Control Warrior. We'd have to see in game, but I'm betting it'd be at least a one-of.
Proud : Like the Math AND control Warrior synergy, a bit concerned about the potential power. Would decrease Health to 5 to make sure.
Rush : Heyo, that's insanely strong. There's something you need to consider. Druids have ramping options because they have 0 hard removal cards/spells. Warriors have plenty of them. Cards like this and the Elite above would propel Warrior to the top in a second.
Last Stand : Too strong. You're trying too hard to make Math Warrior work, it needs help, but not that much.
Herod : I like this one better.
Kael :
Conjurer : Weak. 3 Health would be alright, but I wouldn't see this beat Mana Worm.
Battlemage : Quite interesting, stats are too weak though. 4/4 or 3/5 would work better. Like the effect alot.
Phoenix/Egg : Of course, was waiting for it :) Since this is a Kael expansion, you could have went with Al'ar for the lore relation though :).
Portal : Alright.
Teleport : Could end up being strong. Considering Mage is one of the class that relies the least on Battlecries. Would have to see how it evolves, but I'm concerned.
???
Tyrande
Fiendling : Love the effect, but probably promotes a bit too much the use of Cleric and Shadowboxer. I'd definitely try to put at least one in a deck.
Shadow Fiend : Lovely.
Prophet : +1.
Priestess : Fun and gimmicky. Sold.
Suppression : Text is confusing. Will the targeted minion DIE for sure at the start of your next turn, even if it's healed ?
Benedictus : Interesting. Is it a permanent control ? If so the stats need to be lowered to like 3/5 at most.
Akama
Stalker : Really strong. 1/1.
Shaman : The freezing totem should only target minions that attack. Otherwise rather abusive and unnerving.
Vortex : It has 3 chances out of 4 to get a under-cost powerful effect. Charge would be too good (Wolfrider on roids) Divine Shield would be awesome (Silvermoon Guardian on roids), and +2/Taunt is a better Tazdingo. Windfury would be a throwoff surprisingly, even if it's a better Thrallmar farseer. Don't like this card much.
Call : Too strong for the cost. Should be 3 or even 4.
Shear : Don't see the point of this one much, overcosted and tasteless.
Therazane : Hrmm. Think 9 Mana would suit that better, unless you want to drop her stats to 6/8.
Garona
Bandit : Kind of like this. Though hard to use properly at its cost over Defias Ringleader.
Two-timer : MILL ROGUE HYPE.
Spymaster : Way too strong. Not only does it sort of scout your opponent's hand, but odds are that you're probably getting at least 3-4 Health from that in most cases. A 3/5 , 3/6 for 3 Mana is insane.
Coin : Don't like the 50% chance. I'd put a Combo over it. Not sure how strong it would be in comparison to Preparation. Would need to test ingame.
Cutlass : PIRATE ROGUE HYPE. 1/4 Weapon is really strong for Rogue though. SHould lower to 3 Durability or increase to 3-4 Mana.
Wrathion : That's one scary thought. I may make nightmares thinking of this tonite. This is potentially insanely broken. Especially considering its low Mana cost, that means you could play this card, Tinker Oil+Deadly Poison and that's a 14 damage to the face assuming you only have a normal Hero power Weapon, + a 10/5 dragon minion on Board.
Darius Crowley
Beastmaster : Interesting yet potentially too strong. Would have to play around with it.
Spirit : Nice one.
Un'goro : Rather like this one, might be a lil' too strong. Compare it with Mana Wraith which has poor stats for its cost (2/2 for 2). You might need to lower either Attack or Health to 4.
Shot : Aight, though Freezing trap is better version of that.
Launcher : Not sure I'd put that on 1 mana. Since you'd be able to follow-up with a Secret instantly.
Goldrinn : Sold!
Cho'Gall
Kilrogg : Eh, it's okay. Not usable at all at the moment.
Traveler: Kind of like this, not sure if it'd work since the game technically has no Graveyard.
Felhunter : Not the effect I was expecting, but alright.
Banish : Lovely.
Hysteria : Interesting. Need to test that out.
Mannoroth : Seen lots of idea for Mannoroth, but this is probably one of the better ones. Might be a bit too strong. Go 8 Mana.
Maraad
Inquisitor: Aight, Mad scientist better
Protector: OP as fuck
Knight: >.> like the synergy attempt, might be too strong.
Exorcism : Aight
Avenger : Better version of Avenging Wrath.
Turalyon : Wouldn't be used at all. Feels like you're trying too much to create synergies with these cards.
Hamuul:
Talon: Not the effect that I expected for this. Don't like this at all anyway.
Flight: What's up with Windfury ?
Tree: Alright.
Flame: Aight
Emissary: Way too strong.
Overgrowth: Nice.
Fandral : Think this fills more or less the same purpose than Cenarius, but better. Don't like at all.
Nice work overall. Love most of the cards you made ! Some are really questionable and some needs some balancing still.