Goryo's Vengeance wants to reanimate Griselbrand or Atraxa, Grand Unifier off their own graveyard, and Consign to Memory counters the Goryo's Vengeance instant itself is not possible since it's a colored spell, but it does stop key triggered abilities like Overlord of the Balemurk's mill/return trigger and Ephemerate's rebound trigger, disrupting their engine. Nihil Spellbomb exiles a graveyard to remove a discarded reanimation target before Goryo's Vengeance can find it, which is a proactive answer since their whole plan routes through the graveyard. Spell Snare is weak here since few of their critical spells cost exactly two, so we trim it for more targeted graveyard disruption; our maindeck Force of Negation and Thoughtseize already contest their combo turn well.