Blakroc

Crushing Pain seems redundant when you can kill with deathtouch. I would replace them with Sensei's Divining Top or Brainstorm or something else to help your draw.

I have a deck like this, check it out if you need some inspiration.
Deck link: http://www.mtgvault.com/ViewDeck.aspx?DeckID=164351

Good call, I thought he could only kill artifacts.

Great job with this deck man, Niv- Mizzet rocks! =D

I've seen the Kokusho thing used in a dragon storm deck before, but this works just as well =D

Two words: War's Toll.

I would suggest Aether Membrane over Reinforced Bulwark.

thanks for the help. you're right, blightning is much better.

thanks for the comment, Ram-Gang it is.

If I understand this correctly, this deck controls the pace of the game long enough to finish the opponent off with Tombstalker?

He means Desperate Ritual; you splice it onto Lava Spike for the combo.

Taking out Bloodchief Ascension might be a good way to get the deck closer to 60 cards. You can't count on drawing it consistently because you've only got one copy.

The Misty Rainforest is for deck thinning. They make it more likely for me to draw non-lands later in the game.

Looks like a tank, nice job. +1

Looks good, but I would sideboard the Goblin Tinkerers. The effect won't work on all decks, and that will bring your list to 60 cards.

None of these are cards I chose, other people suggested them.

Added the Obelisk, and the Ravnica land is already on the list.

You're right about the Unhinged lands, John Avon at his best.

This looks pretty solid, but I would run 4 Goblin Chieftains in place of a Goblin Artillery or Raging Goblin. Also, I would scrap the Expedition Maps for a few Panic Spellbombs to help Warren Instigator's ability and card draw. Warren Instigator, Siege-Gang Commander and the Chieftains are the heart and soul of this deck, imagine a hand with all three. If you get a swing at your opponent's life with the Instigator and drop a Chieftain and a Siege-Gang, its practically game over.

YES. Finally someone who agrees, Ravnica lands are the best.

Boggart Ram-Gang!