Enchantress decks are a pure engine race — Xantid Swarm buys you a turn free of Swords to Plowshares or a countered combo piece so you can go off with Hermit Druid or Survival uninterrupted. Naturalize and Ray of Revelation are your best tools against their entire game plan, capable of destroying Enchantress's Presence, Serra's Sanctum, Solitary Confinement, or Opalescence to blow up their mana or card advantage engine. Trim slow, situational cards like Krosan Reclamation and Darigaaz's Caldera that don't pressure them quickly enough. This matchup rewards proactive disruption of their engine pieces over grinding since they will out-card-advantage you if the game goes long.