Mono Green wants to flood the board with landfall-triggered threats like Mossborn Hydra and earthbend lands via Ba Sing Se, so Maelstrom Pulse is flexible removal for the nonland threats such as Mossborn Hydra, Icetill Explorer, or Sapling Nursery once it's online (it can't target lands, so earthbent lands are out of reach). Glorious Decay is in for its graveyard mode: exiling Esper Origins from their graveyard stops its flashback, exiling a card from their graveyard disrupts Icetill Explorer's graveyard land recursion, and it replaces itself by drawing a card. The Ooze helps grind out a long game by turning +1/+1 counters on our creatures into Mutagen tokens when they leave the battlefield, and it can also exile cards from graveyards. Stir Up Trouble's sacrifice tax is awkward against a deck with few early targets and little pressure, and Wolverine and The Misty Mountains Cold are a touch slow against their proactive ramp plan.

Strategic Betrayal is a decent answer to Dimir Midrange's creature suite of Dream Beavers, Floodpits Drowner, Enduring Curiosity and Spyglass Siren, but it needs care. It targets the opponent, not a creature, so they choose which creature to exile. It is best when they have only one or two creatures and weaker when they have a wider board. It only hits creatures, and Kaito is not a creature on our turn, so this sorcery can't answer him. If they do pick Enduring Curiosity, it is exiled rather than dying, so it doesn't return. The graveyard exile is a small bonus. Duress is better against Kaito, since it can take him from their hand along with their own Requiting Hex, Bitter Triumph, or counterspells like We Say Thee Nay! before they can interact with our threats. The extra Requiting Hex is great against their cheap early plays like Dream Beavers and Floodpits Drowner, which are both mana value 2 or less. Callous Inspector is a fragile 1/1 that costs us life when it dies, and Stir Up Trouble's extra cost of a sacrifice or four mana is clunky against cheap, value-generating creatures. Rottenmouth Viper is slow against their proactive disruption suite and exposed to removal like Bitter Triumph and Shoot the Sheriff.

This is the exact mirror, so the game is won on efficient one-for-ones and disruption of their key sacrifice payoffs like The Sackville-Bagginses and Obsessive Pursuit. Duress strips their removal (Requiting Hex, Stir Up Trouble) or Professor Dellian Fel before it can land, which is especially valuable on the play. Maelstrom Pulse is a clean answer to Smaug the Magnificent or Umbral Collar Zealot, and Witherbloom Charm's destroy mode picks off their Gene Pollinator, Greedy Freebooter, or Callous Inspector cheaply while its other modes give flexibility. We trim our own redundant copies of Stir Up Trouble and a Callous Inspector since the mirror often grinds into card-advantage wars rather than aggressive races.