Boros Energy goes wide fast with Ragavan, Ocelot Pride, and Guide of Souls generating tokens and incremental advantage, and backs it up with Goblin Bombardment to turn that board into reach. The extra Dismember copies answer Ajani, Nacatl Pariah or Guide of Souls before they snowball, and killing creatures also shuts off some of their energy/counter synergies. Nature's Claim is brought in specifically for Goblin Bombardment, The Legend of Roku, and Blood Moon, all of which can be backbreaking against our land-heavy manabase; we gain 4 life for our opponent but removing a Blood Moon that turns off Eldrazi Temple and Urza's Saga is well worth it. We trim slow top-end and Sowing Mycospawn since we need to be interacting on the board rather than ramping against this aggressive token strategy.