This mirror-adjacent Esper blink deck wants to chain multiple cheap spells and creature ETBs (Ephemerate, Flickerwisp, Phelia) each turn, so High Noon's one-spell-per-turn restriction severely hampers their blink synergies. A second Wrath of the Skies is a strong sweeper against their token/blink value creatures, and Surgical Extraction can strip a key Stitcher-style piece or an Overlord of the Balemurk from their graveyard plans. Silence doesn't stop activated/triggered abilities like Flickerwisp's ETB or Phelia's attack trigger, making it weaker here, and Day's Undoing is unfavorable since they have more card-advantage engines (Overlord, Quantum Riddler) to refill with. Keep Narset and Teferi in since shutting off their extra draws and forcing sorcery-speed interaction is crucial against their flash/flicker shenanigans.