Endurance is our premier tool against this reanimator strategy, putting their graveyard on the bottom of their library to strand Animate Dead, Reanimate, and Goryo's Vengeance targets like Griselbrand or Atraxa before they can be cheated into play, and it can be evoked for free on their turn to interact at instant speed. Sheoldred's Edict cleanly answers a resolved Griselbrand or Atraxa since it doesn't need to target. Fatal Push is weak against their few small creatures (Putrid Imp, Stitcher's Supplier) that don't threaten much on their own, while Snuff Out cannot target their black creatures, so they're trimmed for graveyard disruption. Elvish Reclaimer is too slow to matter before they assemble their reanimation targets.