Rest in Peace is our best card here, completely shutting off Goryo's Vengeance (which needs a legendary creature in the graveyard) and preventing Atraxa or Griselbrand reanimation entirely. Consign to Memory counters Atraxa's enters-the-battlefield triggers when blinked or reanimated, and its replicate mode is great against multiple triggered abilities in one turn. Orim's Chant does not stop a resolved Goryo's Vengeance reanimating Atraxa, so it is cut, and Prismatic Ending struggles against their higher mana-value threats once reanimated. Keep Solitude and Wrath of the Skies to answer any Atraxa or Griselbrand that slips through.