Aura of Silence taxes their Opalescence/Parallax Wave/Replenish plan and gives a way to destroy a resolved Opalescence or Decree of Silence. Cataclysm is a strong alternate sweeper here since after Armageddon-style effects they can only keep one land, one creature, one artifact, and one enchantment, severely hampering their ability to rebuild the enchantment lock. Swords to Plowshares and Wasteland remain crucial to removing animated threats and denying Ancient Tomb. Small creatures come out since the plan shifts toward disruption and mana denial rather than beatdown.