Boros Energy grinds with cheap removal (Galvanic Discharge, Path to Exile), sweepers (Wrath of the Skies, Wrath of God), and card advantage engines like Cori Mountain Monastery and Field of Ruin. Meltdown is excellent here, blowing up their artifact lands and Sacred Foundry/Sunken Citadel mana base while dodging their removal. Extra Unholy Heat gives you more reach and answers Solitude or small creatures, while Spell Pierce protects your key threats or stops a Wrath. Cut Mishra's Bauble and Lava Dart since they're low-impact against a grindy, removal-heavy deck, and trim Mutagenic Growth since combat tricks are less relevant against their sweeper-heavy plan.