http://www.mtgvault.com/jessie/decks/turn-three-1-billion-damage/

[####################### DESCRIPTION #######################]

Magical Hacker can make -'s into +'s and vice versa.

Hopping Automaton, Urza's Avenger, and Hyalopterous Lemure all have a 0-cost ability to give them -X/-X until end of turn. So, targeting them with Magical Hacker gives you:
  Pay 0 mana: Get +1/+1.
  Pay 0 mana: Get +1,000/+1,000
  Pay 0 mana: Get +1,000,000,000/+1,000,000,000
  Pay 0 mana: Get +1,000,000,000,000/+1,000,000,000,000
  Pay 0 mana: You get the point.

Attack with your huge creatures or sac them to Rite of Consumption/Essence Harvest for an Instant Win.

[####################### HOW TO PLAY #######################]

Magical Hacker is key. Search him out with Muddle the Mixture. Once he is on the board, play:
  1) Hopping Automaton/Hyalopterous Lemure/Urza's Avenger
  2) Attack or play Rite of Consumption/Essence Harvest

Dark Ritual for the early mana ramp. With Magical Hacker in play, Dark Ritual adds very quick winning combos. If your opponent has you beaten, a quick Dark Ritual, Death's Shadow/Rite of Consumption is very unexpected.

Unearth gets you back Magical Hacker and Hopping Automaton, your two best creatures in the deck.

Muddle the Mixture gets Magical Hacker into your hand. Search engine the winning piece.

Considering the 7 Rite of Consumption/Essence Harvest, this deck can be single player or multiplayer.

*************** EXAMPLES ***************

Example 1:
  T1 - Swamp. Dark Ritual. Hopping Automaton.
  T2 - Island. Magical Hacker.
  T3 - Swamp. Tap Island for Magical Hacker's ability. Pump up Hopping Automaton as much as you want. Now pay 2 mana for Rite of Consumption on Hopping Automaton. Your opponent takes damage and you gain life.

Example 2:
  T1 - Opponent has you down to 7 life.
  T2 - Island. Play Magical Hacker.
  T3 - Swamp. Dark Ritual. Tap Island for Magical Hacker's ability. Tap Swamp to play Death's Shadow (he becomes a 20/20). Tap 3 Mana for Essence Harvest on Death's Shadow OR Tap 2 Mana for Rite of Consumption. Your opponent loses 20 life and you gain 20 life.

[######################### CHANGES #########################]
2017.11.26:
  [REP] 4 Rite of Consumption > 4 Dead Reckoning
  [REP] 3 Unearth > 3 Stir the Grave
2014.11.28:
  [REM] 3 Jace, the Living Guildpact
  [ADD] 1 Death's Approach ; 2 Viscid Lemures