Oops, All Spells! is a deterministic combo deck that mills itself with Balustrade Spy or Undercity Informer to trigger Narcomoeba into play, then flashes back Dread Return to reanimate Thassa's Oracle for the win — it can do this as early as turn one with the right ritual draw. Grafdigger's Cage is your premier hate piece: it prevents Narcomoeba from entering the battlefield from the graveyard, collapsing the entire combo chain before it starts. Consign to Memory provides redundant disruption by countering Narcomoeba's triggered ability or countering Dread Return when cast from the graveyard via flashback. Keep Veil of Summer to protect your hand from their eight discard spells and your combo from Pact of Negation blowouts; Force of Will remains critical for stopping their combo on the stack if they go off through a Cage somehow. This is a race — prioritize explosive starts with Ancient Tomb and Lotus Petal, and aim to land a Cage or deploy your own combo before they can assemble the necessary rituals and mill pieces.