Oops! All Spells is a near-goldfish combo deck that mills itself via Balustrade Spy or Undercity Informer, then wins through Dread Return into Thassa's Oracle — your mainboard Grafdigger's Cage already shuts off both Narcomoeba triggers and Dread Return, and Pithing Needle naming Undercity Informer (an activated ability) stops that half of the kill entirely. Post-board, stack the disruption layer: Damping Sphere combines with your four main-deck Spheres of Resistance to make ritual chains (Dark Ritual, Cabal Ritual, Lotus Petal) extremely inefficient, and Disruptor Flute naming Creature taxes Balustrade Spy, Undercity Informer, Simian Spirit Guide, and Elvish Spirit Guide all at once. Endurance provides flash-speed graveyard exile to answer any combo sequence that gets started, and can be cast for free by pitching a green card if needed. Trim the utility lands — Glacial Chasm, Maze of Ith, Karakas, Ghost Quarter, Shifting Woodland, and Blast Zone — that provide zero interaction against a nearly land-free combo deck, replacing Bojuka Bog with the more flexible Endurance.