Paying 2 life to have them come in untapped helps you to stay on curve, and in decks like Death's Shadow, that life loss is actually a bonus
You see, whenever you discard a card, if it has madness, you get to untap Anje
By the time you get to Aeve, you could potentially have a game-winning Commander
Boros Energy (15.1% of the Winner's Metagame) 4 Ajani, Nacatl Pariah 4 Guide of Souls 4 Ocelot Pride 4 Phlage, Titan of Fire's Fury 4 Ragavan, Nimble Pilferer 4 Galvanic Discharge 4 Arid Mesa 4 Flooded Strand 3 Goblin Bombardment 3 Arena of Glory 3 Sacred Foundry 3 Seasoned Pyromancer 3 Marsh Flats 3 Fable of the Mirror-Breaker 2 Elegant Parlor 2 Plains 2 Static Prison 2 Thraben Charm 1 Mountain 1 Windswept Heath 4 Molten Rain 2 Orim's Chant 2 Deafening Silence 1 Wear // Tear 1 Showdown of the Skalds 1 Celestial Purge 1 March of Otherworldly Light 1 Wrath of the Skies 1 Blood Moon 1 Stony Silence In the early days of the post-ban Modern format, Boros Energy has established itself as the deck to beat
Its a very simple way of ramping, and while its no good for those aiming for one of every color by turn five, its still an absurdly potent way of gaining mana
just be wary of multiples in your opening hand