Rakdos Reanimator is nearly identical in gameplan to UBG Reanimator — they use Dark Ritual and Lotus Petal to fuel Faithless Looting or Unmask to discard Griselbrand or Atraxa, then Reanimate, Animate Dead, or Shallow Grave brings it back immediately, often on turn one. Thoughtseize and Cabal Therapy strip your counters first, so your best pre-emptive answer is Containment Priest, which prevents reanimated creatures from entering as intended. Consign to Memory at instant speed exiles reanimation spells off the stack cleanly. Surgical Extraction is most valuable after you kill or counter a Griselbrand — exile the remaining copies to shut off their primary win condition. Keep Force of Will, Force of Negation, and all your interactive spells; Erode, Beza, and Forth Eorlingas! do nothing meaningful against a turn-one combo kill.