Hydroblast is highly effective, countering their Skred or destroying red permanents while also punishing their reliance on red mana for removal. Annul is more marginal since most of their key cards (Ephemerate, Mulldrifter, Augur of Bolas) aren't artifacts or enchantments, but it can stop an errant Bender's Waterskin if needed - lean more on Hydroblast. Spell Pierce struggles against a deck with plenty of mana from Perilous Landscape and cheap cyclers, and Murmuring Mystic invites a Skred blowout since it only has 5 toughness and dies to enough snow permanents. Thorn of the Black Rose is risky against Skred as a 1/3 that's easy to kill for value; prioritize efficient removal on Archaeomancer and Mulldrifter to deny their card advantage engine.