Esper Ephemerate relies on artifact value creatures like Baleful Strix and Refurbished Familiar, so Dust to Dust exiling two artifacts at once strips key permanents and disrupts their artifact count for affinity costs. Steel Sabotage can counter an incoming artifact spell like Refurbished Familiar or bounce an already-resolved threat, giving us tempo back against their grindy Ephemerate-and-blink value engine. Cutting Giant's Boulder and some Reckoner's Bargain trims slower pieces since this matchup rewards efficient interaction over incremental value, as they will out-grind us with Counterspell and Lorien Revealed if the game goes long. Keep pressuring early since their deck wants to stabilize into a long game.