Dimir Midrange is full of key noncreature spells (Requiting Hex, Bitter Triumph, Shoot the Sheriff, We Say Thee Nay!, Strategic Betrayal, Kaito) and triggered abilities like Floodpits Drowner's enters trigger, so Spider-Sense can counter their crucial instants and sorceries or those triggers at instant speed. The Queen of Dale gets value from their noncreature-heavy removal suite, since it triggers whenever they cast their first noncreature spell each turn, giving you steady card selection and the occasional token. Springleaf Drum and Nurturing Pixie are the weakest mainboard pieces against a grindy, removal-dense matchup where you want more interaction.