Hearthpwn

 you've grown little guy !! Tome Tampering

you've become a staple in most wild warlock decks!!

This lil guy is probably one of the best cards in karazhan and yet he goes so unoticed, that double imp + doomguard drawing 4 cards won me some games

This card is absolutely fantastic. Single-handedly carries me all the way to victory. Discard's main downside is that you lose a card (most of the time, unless it hits Clutchmother Zavas or Silverware Golem) but by drawing an extra card you don't really lose anything. Helps dig through your deck quickly without having to tap, and can be pretty devastating in combination with cards like Lakkari Felhound.

Definetely the hero of my discolock :D

Quote from Fishtard >>

This card is absolutely fantastic. Single-handedly carries me all the way to victory. Discard's main downside is that you lose a card (most of the time, unless it hits Clutchmother Zavas or Silverware Golem) but by drawing an extra card you don't really lose anything. Helps dig through your deck quickly without having to tap, and can be pretty devastating in combination with cards like Lakkari Felhound.

Definetely the hero of my discolock :D

The card is also the wrong size, 400×543, instead of 286×395 like all others. Looks like their image-generating script forgot to build the final version for this one.

Edit, three months later: it has been fixed! Praise Yogg!

We need a giant who cost 1 less for each card discarded this game

Quote from Hoodlum2226 >>

We need a giant who cost 1 less for each card discarded this game

For those who don't know, you actually have to discard a card (cards) for this card's effect to activate. PlayingDoomguard or Darkshire Librarian etc with an empty hand will not draw you any cards. 

Quote from Ligiertheexalted >>

For those who don't know, you actually have to discard a card (cards) for this card's effect to activate. PlayingDoomguard or Darkshire Librarian etc with an empty hand will not draw you any cards. 

In the next expansion I'd like to see the lock legendary be like a 3 mana 1/6 : when you discard a card your opponent discards a card.

Blizzard don't want to make cards that attack your opponent's hand, I believe.

Just look at the old mind vision

Fuck no. MtG was forever ruined since they introduced cheap discard spells, cheap Hearthstone discard would just ruin it as well.

MTG you mean the most popular card game of all time? yeah it would be terrible to be like them... FYI discard doesn't matter in magic much at all at this point.

Here take a look at these cards. '

http://gatherer.wizards.com/Pages/Card/Details.aspx?name=POX

http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=413634

http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=193428

http://www.mtgsalvation.com/cards/theros/21843-thoughtseize

http://www.mtgsalvation.com/cards/eternal-masters/27034-cabal-therapy

Every single one of these cards has been over the top expensive over $8+ per card ever since they were printed and why? Because they are way too powerful. Good against aggro and good against control and good against combo. Almost all decks run these cards in their respective format and they do their job so well that half of the cards I linked above are banned in regular formats. They are one of the sole assblasting cards in MtG that people run and they shift the meta way too much. 

Imagine using this instead of a voidwalker or argent squire in a zoo deck, makes Doomguard and Soulfire more appealing.

Demonfire?

If They really Want Discard-lock  to be a thing they have to Make this card :

a legendary

whenever you discard A CARD , play IT ,

Or possibly a legendary that plays all cards that were discarded this game.