Jeskai Artifacts is built around cheap artifacts (Mox Opal, Lotus Petal, Mishra's Bauble, Sewer-veillance Cam) so Brotherhood's End's artifact-wipe mode destroys most of their artifacts with mana value 3 or less in one sweep. Urza's Saga is an enchantment land, so it survives the sweep, but any Construct tokens it has made are artifacts and die. Abrade can destroy key artifacts like Mox Opal or a Construct token from Urza's Saga, giving us flexible removal against their engine pieces. We cut Flusterstorm since it doesn't stop their artifact-based combo and Simian Spirit Guide since we want maximum disruption, trusting our own mana base to get there. Winning the long game with Atraxa's card advantage is strong once we've broken up their artifact synergies.