Hearthpwn

Here's a really short one.  Should be easy, but I thought it was funny.

It would be utterly cataclysmic to play me!
It would be utter Lunacy to do so!

It has to be Cataclysm right?

I'm gonna go with deathwing in case cataclysm is wrong.

That's actually neither.

Wild guess: Stargazer Luna ?

I like the idea, Destroyer, but you're on the wrong track.

Daraja is picking up a little bit on part of it, but hasn't put it together quite.

Just gonna toss out my first guess since I'm suppose to be in class: Astral Communion

I'm quite confident that Pyro is right, but just in case he's not I'll go for Baku the Mooneater.

Lucentbark ?

Quote from Pyrotrap >>

Just gonna toss out my first guess since I'm suppose to be in class: Astral Communion

 Pyrotrap grabs it.

A reference to Cataclysm, 4 mana, discard your hand, and a reference to 'Astral,' 'Lunacy,'  or, y'know, moon madness.  "Hey! Moon! Can I have some mana crystals?"

Lunacy was specifically capitalized to draw attention to the pun, hence the reason Cataclysm wasn't acceptable.

Although my stats are really quite lame

I usually only come out late game

Don't expect me to act very nice

I must get my master a sacrifice

So that he can put the enemy to shame

Is it Blade of C'Thun?

Although my stats are really quite lame - Only 4/4

I usually only come out late game - It's 9 mana

Don't expect me to act very nice - It will destory a minion

I must get my master a sacrifice - The master being C'thun

So that he can put the enemy to shame - Playing C'thun in a later turn, dealing damage

Yeah daraja got it.

Alright, my first one (might be a bit too easy, but we will see).

I do not very often see play

But when I am played my colors are gay*

I am usually chosen by my maesters new

'cause they only have a set of cards few

* Gay should be interpreted as joyful, no flame intended here.

Whizbang the Wonderful

Colorful entrance, good to craft if you haven't many cards in collection

Yes, kipper_red's got it! Your turn!

ok.

Do you remember times,
And company which name is fruity,
Owning me on its device,
Was kind of duty.
And despite it's not my real name,
I'm definetely not a card that is lame.

Rotten Applebaum? 

Quote from kipper_red >>

ok.

Do you remember times,
And company which name is fruity,
Owning me on its device,
Was kind of duty.
And despite it's not my real name,
I'm definetely not a card that is lame.

 Hmmm, could it be Khadgar? The only way to obtain him as a hero skin was through a special Apple App Store promotion.