Boros
A Modern deck, by kbr3
1st place at a tournament in Magic Online on 2012-01-22

Maindeck:

Creatures
4 Chandra's Phoenix
3 Figure of Destiny
4 Goblin Guide
4 Grim Lavamancer
4 Plated Geopede
4 Steppe Lynx

Instants
4 Lightning Bolt
4 Lightning Helix
4 Path to Exile
3 Searing Blaze

Basic Lands
4 Mountain
2 Plains

Lands
4 Arid Mesa
2 Boros Garrison
4 Marsh Flats
2 Sacred Foundry
4 Scalding Tarn

Sideboard:
3 Shrine of Burning Rage
3 Combust
3 Disenchant
3 Refraction Trap
3 Volcanic Fallout