Terrageddon's Armageddon plan is the real danger, and while Naturalize can't touch Armageddon itself, it answers their maindeck Seal of Cleansing or any artifact/enchantment they bring in from their sideboard like Aura of Silence or Cursed Totem. Goblin Sharpshooter is a slow value engine that doesn't matter in a matchup defined by explosive starts and sudden land destruction. The key to winning is racing before Armageddon locks the board, since your Mountains and Karplusan Forests rebuild faster than their heavier mana base. Keep your full curve of cheap Goblins to pressure their life total before the Armageddon turn.