Mono-Green Eldrazi's top end is built on colorless cast triggers, so Consign to Memory counters Emrakul, the Promised End's mind-control trigger and Kozilek's Command outright, and can also stop the value trigger off Sowing Mycospawn. Emperor of Bones supplies graveyard exile to blunt their Malevolent Rumble and Green Sun's Zenith value engines while adding a recursive threat of your own. Teferi's -3 rarely has a good target against a deck of large green creatures that dwarf what you can profitably bounce, so it and some lands come out for interaction; save Solitude and Fatal Push to answer Disciple of Freyalise or Fanatic of Rhonas before their mana engine snowballs into Emrakul or Ulamog.

Consign to Memory is excellent here, countering the triggered abilities off Devourer of Destiny and Emrakul, the Promised End's cast triggers, as well as colorless Kozilek's Command activations, stripping the deck of its biggest swings before they resolve. Emperor of Bones lets you exile key cards like Basking Broodscale or Emrakul out of their graveyard before Kozilek's Command or Devourer of Destiny can find value there, and doubles as its own recursive threat. Teferi comes out since their deck has few instants to punish and its bounce mode is weak against a board of Eldrazi Spawn tokens, while trimming lands slightly smooths the curve for the incoming spells. Prioritize using Solitude and Fatal Push proactively on Basking Broodscale and Glaring Fleshraker before they generate token value.

Izzet Prowess wins by burying you under cheap one- and two-toughness creatures like Monastery Swiftspear, Dragon's Rage Channeler, and Slickshot Show-Off, so Pest Control's sweep of mana value 1 or less permanents cleanly answers Swiftspear and Mishra's Bauble while Wrath of the Skies scales up to catch Dragon's Rage Channeler and Cori-Steel Cutter tokens. Heartless Summoning's -1/-1 doesn't help against a deck with almost no creatures to cheapen and only shrinks your own Solitude and Overlord of the Floodpits, so it's cut alongside Momentum Breaker, which whiffs against a deck that rarely commits a single important permanent. Play around Consign to Memory-style counterplay by holding up Fatal Push and Solitude to answer Dragon's Rage Channeler or Cori-Steel Cutter before they take over combat math.