Tsabo's Web shuts down Wasteland, Rishadan Port, and Mishra's Factory, stripping away their disruptive and creature-land utility. Meddling Mage naming Oath of Druids is huge, denying their primary card advantage/cheat engine before it comes online. The extra Seal of Cleansing adds another answer to Sphere of Resistance, which taxes our own spells. Intuition and Frantic Search are cut for more proactive disruption, since this matchup rewards denying their engine pieces over digging for our own combo.