Selesnya Landfall is another Earthbender Ascension/Mightform Harmonizer deck, so Duress strips their key enchantment before it snowballs out of our removal range. Ghost Vacuum disrupts Icetill Explorer's ability to replay lands from the graveyard and denies value from their fetch-heavy landfall shell. Sunset Saboteur's forced +1/+1 counter on an opposing creature is a real downside against a go-wide, counter-synergy deck, so it sits in the sideboard. Dark Knight's Greatsword is too slow to keep pace with their curve of efficient, growing threats.