Before you read, understand that the Wee Dragonauts in the deck list are placeholders for Kiln Fiends that I havent ordered yet.
This is my Izzet Aggro build. I originally based it on the Izzet prowess deck in standard right now, but as I continued to check out the options for it in pauper, I was very excited to find Nivix Cyclops and Kiln Fiend (still need physical copies). Someone then linked me to Izzet Blitz on Mtg Goldfish, and I loved it. I decided to brew up my own version of it, and it is working great.
If you don't understand by reading the cards, the basic idea behind this deck is to cast a lot of cheap spells, to pump the nivix cyclops, and kiln fiend to a high enough power to swing for a one hit KO. The best way to do this is to use cantrips to essentially fetch for more can trips until you're out of mana. The more spells you cast, the more you can trigger the creatures' abilities and the more damage you can do.
Your serious win conditions are Assault Strobe, Temur Battle Rage, and Slip through Space. These allow you to do life threatening amounts of damage with evasion, so you can't get chump blocked, or outmuscled by aggro decks.
Brainstorm, Ponder, Preordain, Gush and even Titan's Strength help you fetch for win conditions, as well as other cantrips, and also allow you to manipulate your top deck to allow a faster transform for delver of secrets.
Vapor Snag and Lightning bolt are utilities for taking out the last few bits of your opponents health if they survive your big swing. Vapor Snag can also allow you a bit of control against large creatures like Ulamog's Crusher and Hand of Emrakul, and lightning bolt can take care of pesky little buggers like Crypt Rats or opposing Delvers.
Titan's Strength and Mutagenic Growth are to help tack on some heavy damage. Mutagenic Growth on a Nivix Cyclops or Kiln Fiend gives them +5/+2 for 0 mana cost, and Titan's Strength gives them +6/+1, and allows you to scry 1 for 1 mana.
If conditions are right, you can win on turn 3 or 4 with this deck, but usually gets the final swing in by turn 6.
