Boros Control attacks you on two axes: land destruction (Field of Ruin, Demolition Field, and Cleansing Wildfire targeting Urza's Saga) and board sweepers (Wrath of the Skies), so your priority post-board is protecting key permanents and countering their most impactful spells. Consign to Memory is your best weapon — hold it up to counter Wrath of the Skies, Path to Exile, or Solitude before they can devastate your board. Swan Song and the additional Metallic Rebuke give you cheap coverage for their sorceries and instants, while the extra Galvanic Blasts efficiently answer White Orchid Phantom and Chandra, Torch of Defiance before they generate card advantage. Tormod's Crypt is entirely dead here since Boros Control runs no meaningful graveyard synergies, and Emry and Sink into Stupor are too slow and fragile against a deck with this density of exile-based removal. Lean on Welding Jar and Claws of Gix to protect your key threats in response to spot removal, and deploy your threats one at a time rather than overextending into their sweepers.