Sneak and Show wants to resolve Show and Tell or Sneak Attack into Emrakul, the Aeons Torn or Griselbrand, so our plan is to grind through their countermagic (Force of Will, Flusterstorm) and durdle them out with card advantage while holding up our own Force of Will and Force of Negation to strip a Show and Tell or Sneak Attack before it resolves. The extra The One Ring gives us a fourth copy of our best long-game card advantage engine along with temporary protection from everything, buying time against a fast Emrakul. Hydroblast is live against Sneak Attack, Prismari Charm, and their other red spells, and Barrowgoyf is a resilient clock that punishes them if the game goes long. We trim Waterlogged Teachings, Expedition Map, and two Island since we want maximum interaction density rather than extra mana smoothing in a matchup decided by countering their key enabler.