This matchup is a race against their enchantment-based lock, so Ray of Revelation gives you a cheap, proactive answer to Opalescence, Parallax Wave, or Decree of Silence before they lock the board. Genesis provides recursion, letting you rebuy creatures you discard to Survival of the Fittest or that otherwise land in your graveyard. Arrogant Wurm comes out since it is clunky against a deck that wants to go over the top rather than trade creatures, and Squee is replaceable filler. Nantuko Vigilante stays in because turning it face up can destroy one of their enchantments. Keep Wasteland and Rishadan Port in to pressure Ancient Tomb and slow their mana.