http://www.wizards.com/Magic/Magazine/Article.aspx?x=mtg/daily/arcana/1067

The mad geniuses of the Izzet League are known for their brilliant innovation—and catastrophic experimentation. The "Izzet Ingenuity" deck takes advantage of both. When you win, you win big. Harness the genius of the Izzet League, and immolate your opponents with a flurry of arcane power.

Start out by building yourself an army—the Goblin tokens created by Krenko's Command and Goblin Rally are a good start—then add an air force of flying creatures like Welkin Tern and Runewing. Use Cobblebrute to trade with bigger threats, and attack with a flier when you can. Spend the early turns getting creatures onto your own side of battlefield rather than casting spells to deal with your opponent's creatures.

When your opponents least expect it, pull the trigger with an Electrickery or Teleportal, and they'll never know what hit them. Or untap with a Guttersnipe on the battlefield ready to turn a burst of instant and sorcery spells into tons of damage. Or play your fifth land to cast Hypersonic Dragon and immediately send it in on offense. Or maybe you'll just cast a spell with overload like Mizzium Mortars or Blustersquall to devastate your opponent's defenses and then charge in to end the game.

If you find yourself looking to cast even bigger flurries of spells, the flashback mechanic from the Innistrad block is a great way to ensure that your Guttersnipes and Blistercoil Weirds live up to their potential. Cards with flashback can be cast a second time from your graveyard. If big monsters are more your cup of tea, look to Izzet cards like Utvara Hellkite and Niv-Mizzet, Dracogenius himself.