For only 2 mana and 1 earth threshold Common Sense is flexible for most strategies
Meanwhile, cards like Boros Charm, Heroic Intervention, Ghostway, Avacyn, Angel of Hope, and Teferis Protection can simply take you out of a bad situation outright
Ice Block As said above, Ice Block can be used in tandem with the already deadly Ruby/Sapphire strategy to achieve some pretty chilling feats, making it easier for cards like Sisu or Madem Medusa to outright banish anything and everything in sight
4 Champions Of Minas Tirith As monarch, youll want to keep your subjects safe, and with Champions of Minas Tirith, youll have an easier time

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Flying Each creature spell you cast has emerge