Goryo's Vengeance wants to reanimate Griselbrand or Atraxa, Grand Unifier via Goryo's Vengeance for an explosive turn, so Endurance is premium since its enter-the-battlefield ability shuffles their graveyard away, denying the reanimation target entirely, and it can also be evoked for free on their turn. Thoughtseize proactively strips their combo piece (Goryo's Vengeance) or their countermagic (Force of Negation) before they can protect their plan. We cut Walking Ballista copies since they're mediocre against a deck not relying on small creatures, and Formidable Speaker/Dredger's Insight are too slow when we need to be disruptive on curve. Keep Yawgmoth and Agatha's Soul Cauldron as our proactive win conditions since this matchup is largely a race plus disruption.