Hearthpwn

The deck itself is an interesting concept: get Malygos out, let it die, resurrect twice, then drop two 15-damage mind blasts. But there are a number of shortcoming that I notice.

1. There is absolutely no draw in this deck. How do you expect to get all 5 pieces of Exodia (*cough* your combo *cough*) without a means to draw them quickly? I get that having many board clears and heals will stave off death, but only for so long. I had a similar deck that dropped board clear on top of board clear and I would eventually get murdered later on because I was low health before I could use most of the clears and I ran out of anything to stop my opponent. Speaking of stopping your opponent...
2. There are no taunts in the deck. Yeah, I get that you want only Malygos in there for the whole resurrect deal, but lacking taunts is a sure-fire way to die. That being said...
3. Would doing an Emperor Thaurissan one turn, then Brann Bronzebeard + Barnes (to pull out Malygos twice) + 2x Mind Blast be a viable alternative? Perhaps you might run a couple Onyx Bishops as well to circumvent bad luck if can't use the alternative combo because Malygos was already drawn. Do you have Faceless Manipulator? The best combo decks I've seen have different win conditions within the same deck. I'd explore those a bit.
4. Finally, how is this OTK deck as consistent or more so than other OTK decks? How does it hold up against Jade decks? Pirate Warrior, who uses a ton of charge minions, Arcanite Reapers, and junk like that to zerg you down before you can even blink? (Hint: taunts work wonders here). How do you deal with control Warrior building up a ton of armor? Can you win out against combo or freeze Mage?

Just food for thought. I don't think it's a bad concept, but it seems to have a lot of weakness with regard to the current Jade and Pirate meta that's going on now.