Boros Energy

Boros Energy is an opportunistic deck with the purpose of beating up other fair decks. To achieve that goal, it has a slightly higher mana curve than Mardu Energy to include cards like The One Ring and Phlage, Titan of Fire's Fury, which makes it comfortable going into longer games. The usual Energy all-stars like Guide of Souls and Ocelot Pride back up those powerful midrange cards.

Be warned, though, while Boros Energy has a great matchup against fair decks, it absolutely falters against Combo decks!