Esper Ephemerate leans heavily on artifact lands and artifact value creatures (Baleful Strix, Refurbished Familiar) alongside Ephemerate loops, so Dust to Dust strips their mana base or removes a key artifact creature before it can be blinked again for more value. Standard Bearer forces their removal (Dispatch, Giant's Boulder) or targeted interaction away from your real threats, which is valuable against a grindy control deck that wants to pick apart your board piece by piece. Guardians' Pledge is a weak topdeck against a deck full of Counterspell and cheap interaction that can simply answer your empty-handed alpha strike, and Idyllic Grange's tapped downside is too slow in a long grindy game where tempo still matters early. Keep Thraben Charm's graveyard-exile mode in your back pocket, though it's already mainboard, since it can hit their own Archaeomancer/Mulldrifter value if relevant.