Mono-Green Eldrazi ramps through Eldrazi Temple and Ugin's Labyrinth into Emrakul, the Promised End and a wide array of midsized creatures, so Damping Sphere slows their colorless mana engine considerably. The Meathook Massacre sweeps their smaller creatures like Icetill Explorer or Writhing Chrysalis tokens while draining life, and an additional Force of Despair is strong against a turn where they dump multiple ramp creatures at once. Dauthi Voidwalker cannot block their creatures due to shadow and doesn't meaningfully slow their ramp plan, while Sorin of House Markov and Beseech the Queen are too slow to matter before they hit critical mass. Keep Thoughtseize to strip Emrakul and Inquisition of Kozilek to strip key ramp pieces before they resolve.

This matchup is a race against Urza's Saga, Eldrazi Temple, and Ugin's Labyrinth ramping into Emrakul and Devourer of Destiny; Damping Sphere blunts the multi-mana lands and slows Kozilek's Command/Malevolent Rumble value chains. Surgical Extraction can strip a key Urza's Saga or Basking Broodscale copy after it hits the graveyard, and the second Force of Despair is excellent against their many enters-the-battlefield ramp/value creatures cast in a single turn. Dauthi Voidwalker is weak here since it dies to Kozilek's Command exile, cannot block their Blade of the Bloodchief-fueled attackers due to shadow, and doesn't pressure their colorless-heavy plan, while Soul Spike is too slow against a deck assembling lethal Emrakul turns. Keep Fatal Push, Thoughtseize, and Inquisition of Kozilek maximized to strip their engine pieces before they land.

Izzet Prowess floods the board with cheap 1-2 toughness threats like Monastery Swiftspear, Dragon's Rage Channeler, and Slickshot Show-Off, so The Meathook Massacre is a sweeper that affects all creatures while gaining you life for each opposing creature that dies. Requiting Hex and Sheoldred's Edict are cheap, efficient answers to their small creatures that dodge having to tap out into Lightning Bolt or Lava Dart. Sorin of House Markov and Beseech the Queen are too slow against a deck that wants to kill you before turn 5, and the extra Graveyard Trespasser isn't as impactful since this matchup isn't graveyard-dependent. Prioritize Fatal Push and Fell the Profane to answer their early threats before Cori-Steel Cutter or prowess triggers snowball out of control.