Mono Green Landfall wants to go bigger than us with Mossborn Hydra and Mightform Harmonizer, so Glorious Decay's 4 damage mode is a clean answer to nothing with flying here but its artifact-destroy mode and card draw from exiling a graveyard card are still useful against Earthbender Ascension and Esper Origins' flashback. Bitter Triumph is unconditional removal for their bigger threats where Requiting Hex (mana value 2 or less only) whiffs on Mossborn Hydra and Icetill Explorer. Guerrilla Gorilla's reach blocks Mossborn Hydra profitably and its sacrifice ability answers Earthbender Ascension or Sapling Nursery. Deadly Precision is cut since its sac-cost is awkward in a grindy matchup where we want to keep our board.

Dimir Midrange is loaded with interaction (Requiting Hex, Bitter Triumph, We Say Thee Nay!) and value creatures like Kaito and Enduring Curiosity, so Duress proactively strips their removal or countermagic before we commit threats. Bitter Triumph gives us unconditional removal for Kaito, Bane of Nightmares once it flips into a 3/4 hexproof-during-their-turn ninja, since our own turn is when it loses hexproof. Obsessive Pursuit is a slower, grindier card that doesn't do enough against their card advantage engines, so we trim to two. Umbral Collar Zealot's sacrifice-for-surveil is too marginal when we need proactive disruption instead.

This is a near-mirror against BRG, so grinding card advantage and removal density wins. A second and third Professor Dellian Fel gives us repeatable removal with the -3 ability and incremental life gain to out-value their own copies and The Sackville-Bagginses sacrifice loop. Glorious Decay's artifact-destroy mode hits their Treasure tokens and Clue tokens to slow their mana and card advantage, while Guerrilla Gorilla provides a body that can sacrifice to answer any enchantment or artifact they stick, like our own Obsessive Pursuit mirror or The Misty Mountains Cold. We trim the weakest one-of bodies and Deadly Precision, since in the mirror we'd rather have Dellian Fel's repeatable -3 than a one-shot removal spell with an awkward additional cost.