UBG Reanimator races to cheat Griselbrand or Atraxa, Grand Unifier into play via Reanimate, Animate Dead, or Shallow Grave, so answering their graveyard plan and hand is critical. Surgical Extraction can exile a discarded Griselbrand or Atraxa, Grand Unifier before they reanimate it, completely denying that line. The extra Cabal Therapy strips their reanimation spell or a key creature from hand pre-emptively. Duress only hits noncreature spells and can't touch Griselbrand or Atraxa sitting in hand, so it's cut for the more surgical graveyard answer; Beseech the Mirror is trimmed by one to prioritize speed since this matchup is a fast race.