A straightforward burn deck: Throw fire in your opponents face. Fast paced with low CMC.
Grim Lavamancer give you extra value for your spells. Harsh mentor burns opponents for fetching lands and forces them to use up their removal. Eidolon burns everyone on the field, but the idea is to burn your opponent faster than eidolon burns you with 3 damage spells like spike and bolt. Magma jet lets you scry on the opponent's end step to ensure you're top-decking what you need. The rest is all pretty standard burn.
Mulligan if you draw less than two lands, or if you get a thunderous wrath. You need that as a draw for miracle.
Sideboard: Anger of the gods is there to deal with tokens/weenies/regenerators. Ash zealot also provides some graveyard coverage, hitting back at snapcasters and anything with flashback.
I've found the biggest threat to my deck is Leyline of Sanctity. In order to deal with it, I board out rift bolts and other burn spells and board in the zealots, the mentors, Apostle's Blessings and the blood moons. More creatures makes it possible to still hit them. Blood moon keeps them from casting anything. Apostle's Blessing is a good response to removal.
Finally, Smash to Smithereens is there to deal with annoying artifacts that slow down your burn with out sacrificing the game plan of burning your opponent with spells.