Oops! All Spells is a turn-1 or turn-2 combo deck that wins by milling its entire library with Balustrade Spy or Undercity Informer, then reanimating creatures via Dread Return to set up a Thassa's Oracle win. Your primary interaction is Force of Will and Daze backed by countermagic density — hold up interaction and don't tap out carelessly. Grafdigger's Cage is your most powerful hate piece, shutting off both the Dread Return reanimation line and Thassa's Oracle's ability to win through the graveyard. Force of Negation comes in as additional free countermagic to handle their fast mana and key spells like Pact of Negation, Balustrade Spy, and Undercity Informer. Boomerang Basics and Cori-Steel Cutter come out because this is a pure race where resource-building artifacts and mana denial are irrelevant — you need interaction, not tempo plays that don't stop the combo.