This is a graveyard mirror where the opponent's game plan revolves around reanimating Archon of Cruelty via Persist, Emperor of Bones, or Unearth, making Consign to Memory the most impactful sideboard card — it cannot be countered by their Spell Pierce and stops all three reanimation vectors at instant speed. Ashiok, Dream Render single-handedly neuters their graveyard engine by preventing fetching and exiling graveyards on every activation, while Surgical Extraction can permanently remove Archon of Cruelty or Persist to shut down their primary win condition. Teferi, Time Raveler is particularly punishing here because it prevents them from holding up Persist or Unearth at your end step, forcing all of their reanimation into less efficient sorcery-speed windows where your countermagic is easier to deploy. Prismatic Ending has limited targets (their threats are too large and their interaction is non-permanent), and Pest Control is mostly irrelevant; trimming Thoughtseize and Quantum Riddler streamlines the deck toward graveyard disruption, as your raw card quality advantage through Ephemerate plus Atraxa or Solitude is the long-game engine that wins once their graveyard is neutralized.