Breath Weapon's 2 damage cleans up Boros Moxite's Glint Hawks and the 2/2 Robot tokens from Melded Moxite, though Kor Skyfisher's 3 toughness lets it survive, so it's a partial sweeper rather than a full reset. Ancient Grudge destroys a Melded Moxite, Lembas, or other key artifact, though it can't touch their indestructible Bridge lands. We trim one Barrels of Blasting Jelly since it's slow against their low-toughness aggressive curve, and cut Weather the Storm since the extra life is less impactful than removing their board. This matchup rewards proactive sweeper effects over incremental life gain.