Howling Banshee (4)
Neutral Minion (C)
4/2
Battlecry: Your opponent's cards cost (2) more to play next turn.
Her performances are simply breathtaking.

Master Basher

Neutral Minion (R)
7/6
Deals damage through Armor.

Undercity Archivist (9)
Neutral Minion (E)
4/4
Battlecry: Choose a card from your deck and put it into your hand.
She preserves all the wisdom of ancient Azeroth, and all everyone ever wants to know is the address of some Reno Jackson guy.

When you play her, a sidebar similar to the one on the deckbuilding screen pops up. You click and drag the card from your deck into your hand.

Summon: "Knowledge... is a commodity."
Attack: "You're history!"
Death: "Never... forget..."

Hakkar the Soul-Flayer
Neutral Minion (L)
Deathrattle: All minions gain 'This minion gains -1/-1. Deathrattle: A friendly minion gains this effect.'
7/5

Tempting Prey
Druid Minion ─ Beast (C)
Deathrattle: Your next Beast you play costs (2) less.
3/2

Wellwishing
Druid Spell (R)
Choose one: Draw two cards, or Discover two cards.

Ferocious Walker
Druid Minion (E)
Whenever this minion deals damage, summon a random Beast with that cost.
1/5

Lacun Softspeaker
Druid Minion (L)
Battlecry: Silence all minions in your opponents hand.
7/7

Battlecry: "Speak softly...or not at all."
On Attack: "I said BE QUIET!"
On Death: "Nothing so peaceful as the grave."

Scouting Eagle
Hunter Minion (C)
Battlecry: Draw a card.
[Beast]
2/1

omg I wish that card existed.

Big Game Trap
Hunter Spell (R)
Secret: After your opponent plays an Epic or Legendary Minion, destroy it.

Tracer Trap
Hunter Secret (E)
Secret. After your opponent plays a minion, that minion becomes free for you to target with spells.

Spells that target the minion cost . If they don't directly target the minion, e.g., Consecrate, Arcane Missiles, etc., there is no discount.

Ixthra the Hidden (2)
Hunter Minion (L)
6/3
Secret. When your opponent summons a legendary minion, reveal this minion.

Summon: "I am the death of legendsss..."
Attack: "*angry spider noises*"
Death: "Even death... can die..."

lol thats awesome. *angry spider noises*. I'd like the stats to be better and for it to have some kind of ability like Taunt or something. Hunter could use a legendary on par with Tirion or Jaraxxus.

no one needs a legendary on par with Tirion.

Disruptive Summons
Mage Spell (C)
Secret. After your opponent plays a minion, deal 2 damage to all other enemy characters.

Imitate
Mage Spell (R)
Secret: When your opponent plays a spell, put a copy of it into your hand.

Scent of Æther
Mage Spell (E)
Secret. When your opponent plays a spell that targets you, summon three mana wyrms.

Stealing CKY's idea.

Forthisal D'Neve
Mage Minion (L)
Secret. As your opponent plays a minion, exchange this for that minion.
Stealth.
4/4

The exchange happens before the battlecry so you get it, but if the battlecry targets, it doesn't change the target.

Guardian Wyrm (3)
Priest Minion (C)
2/5
Taunt
<Dragon>
There's no domesticating dragons, not really. But if you convince one to treat you as part of its hoard...

Sliver of the Naaru
Priest Minion (R)
Deathrattle: Destroy a random enemy minion with Attack 3 or less.
3/2