Mono-Green Landfall wants to flood the board with landfall-triggered threats like Mightform Harmonizer and Icetill Explorer, so Strategic Betrayal is strong two-for-one removal that also strips their graveyard, denying Esper Origins flashback and Icetill Explorer's graveyard-land recursion. Dispelling Exhale is weak here since we have no Dragons to behold, leaving it as just a soft counter that lets the spell through for {2}, and this deck can't reliably hold up countermagic against a proactive creature curve, so both copies come out. Ghost Vacuum picks off graveyard value from Icetill Explorer or Esper Origins for a marginal one-for-one swap with a Tablet of Discovery.

Mono-Green Landfall wants to flood the board and pump creatures with Earthbender Ascension and Mightform Harmonizer, so Flashfreeze is excellent against their green spells including those key enchantments and Mossborn Hydra. Duress strips a critical enchantment or removal spell before it resolves, since our sweepers (Deadly Cover-Up, Jeskai Revelation) already handle their board. Nowhere to Run is weak here since most of their threats aren't small enough for -3/-3 to matter after a turn or two of pumps, and Consult the Star Charts is too slow against their proactive curve. Keep Shoot the Sheriff and Deadly Cover-Up in as your primary answers to their wide boards.

Dimir Midrange leans on blue and black spells and creatures like Kaito, Floodpits Drowner, and Spyglass Siren, so Flashfreeze is dead against their entire deck and stays in the sideboard; instead bring in Disdainful Stroke to counter their expensive threats like Kaito or Enduring Curiosity, and extra Duress to strip We Say Thee Nay!, Bitter Triumph, or removal before they can interact with your plan. Shoot the Sheriff remains effective against their non-outlaw creatures like Enduring Curiosity and Floodpits Drowner, though it misses outlaw creatures like Spyglass Siren. Meanwhile, Nowhere to Run is weak here since it cannot remove planeswalkers like Kaito, and Sear is often inefficient against their small-bodied threats, even though it can target planeswalkers like Kaito. Together as One is too slow against their disruption-heavy, grindy game plan. Riverchurn Monument adds incidental mill pressure and a repeatable ability that dodges their spot removal since it's not a creature, giving you a slow alternate win condition in a long grindy matchup. Keep your sweeper (Deadly Cover-Up) and card advantage engines (Jeskai Revelation, Stock Up, Consult the Star Charts) fully intact since those are your primary tools against their creature suite and card draw engines.