http://www.mtgvault.com/greenee/decks/definition-of-pure-burn/

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The deck thrives off of aggression. Play your elemental's, hit em hard and fast, then their tools for whatever you want: Fling them for more damage, Infernal plunge for mana, or reanimate/unearth them for the exact same effects to be reused only even cheaper.

Certain cards are there to max damage output, like assault strobe. Breaking Point/Pyroclasm help keep other creatures off the field, and you have nothing to worry about because you only have creatures on the field when you want them.

Example game:
  T1: Mountain, spark elemental
  T2: Swamp, desperate ritual, ball lightning
  T3: Swamp, unearth ball lightning, then fling/rite of consumption him.

  21 damage turn three, no spells. Your opponent was just burned.

**SIDEBOARD**
  For multiplayer games you could also play oversold cemetery
  Skull crack against life gain
  Smash to smithereens against artifact
  Quest for zendikar you use during multi-player to keep a more solid elemental output.