This old thread talks about ways to win during your opponent's first upkeep step if you were on the draw. I thought it might be worthwhile to revisit that idea to see if there's any new cards that could make for an easier win.
The first thing I thought of is simple enough: Elvish Spirit Guide, Simian Spirit Guide, Elvish Spirit Guide (or Simian Spirit Guide, or Gemstone Caverns), Violent Outburst, Pandemonium, Saproling Burst, Any Card. Your deck would need a Hypergenesis in it as the only non-land card that costs below 3 mana. Saproling Burst could also be Serra Avatar. You could also have a Yawgmoth's Bargain in your hand in place of Saproling Burst and Pandemonium, and then draw into a second copy of Violent Outburst and the mana to cast it (assuming you had a second Hypergenesis in your deck).
What other turn zero kills are out there? What's the fewest number of cards in your opening hand that you are required to have? Will anyone dare to live the dream in an actual tournament?