Mono-Blue Stiflenought has no red spells or permanents, so Blue Elemental Blast and Hydroblast are dead, while Naturalize can target their Phyrexian Dreadnoughts as well as Powder Keg. This matchup is decided by the Daze and Mana Leak war over their Phyrexian Dreadnought and Stifle-based combo, so the maindeck's countermagic stays in unchanged (though Wasteland cannot target their basic lands for Gush/Foil alternate costs). Prioritize using Survival of the Fittest to find Gilded Drake as a one-sided answer to a resolved Phyrexian Dreadnought, since it exchanges itself for their 12/12. Careful Study and Frantic Search should be sequenced to hold up Daze mana whenever possible.

Mono-Red Sligh's creatures are almost entirely 1-toughness (Mogg Fanatic, Grim Lavamancer, Ball Lightning) or 2/1s (Jackal Pup), so Pyroclasm sweeps their board for 2 mana and buys crucial time. Hydroblast counters a key red spell or destroys a key red permanent like Sulfuric Vortex, which otherwise burns you out on a clock you can't ignore. Daze and Mana Leak are too slow and tempo-negative against a deck already ahead on the damage race, so they come out for cheap sweeper effects. Race carefully with Basking Rootwalla and Wild Mongrel, and focus on controlling their early creatures rather than racing recklessly when you're behind on life.

Selesnya Enchantress runs heavily on enchantments — Enchantress's Presence, Sterling Grove, Solitary Confinement — so Reverent Silence, which destroys all enchantments as a Sorcery, is a full reset on their engine. Naturalize picks off a single key piece like Sterling Grove or Solitary Confinement before they can chain into more draws. Daze loses value once they establish their mana base, and Frantic Search is less necessary since this is a grindier matchup where card selection from Careful Study and Survival of the Fittest is enough; trim both for the enchantment answers. Use Survival of the Fittest to find your threats early before they bury you under enchantment-based inevitability.