Esper Ephemerate relies on value creatures like Baleful Strix, Mulldrifter, and Archaeomancer blinked repeatedly with Ephemerate, so Cast Down offers clean, unconditional removal for any of their nonlegendary bodies regardless of enters-the-battlefield value already gained. Cast into the Fire can pick off their small Baleful Strix or Refurbished Familiar, or exile a problematic Giant's Boulder. Toxin Analysis and Krark-Clan Shaman are too low-impact against their grindy, value-oriented game plan, so we swap them for more reliable, permanent answers. Race them down before their card advantage engine with Counterspell backup takes over the game.