This is a mirror-ish colorless-mana ramp race where Eldrazi Temple and Ugin's Labyrinth let them go over the top with Emrakul and Devourer of Destiny. Dismember cheaply answers Basking Broodscale or Glaring Fleshraker before they snowball Eldrazi Spawn tokens, while Collector Ouphe shuts off their Springleaf Drum and any artifact-based mana acceleration. Force of Vigor blows up Vexing Bauble or an early Trinisphere from their sideboard. Cut the slower value pieces (Summoner's Pact, some Malevolent Rumble, Aftermath Analyst) since this matchup rewards proactive speed and interaction over incremental card selection.

Izzet Prowess is a fast aggressive deck full of cheap threats like Monastery Swiftspear and Dragon's Rage Channeler that Dismember cleanly answers for as little as one mana. Vexing Bauble is weak here since their spells are almost entirely hard-cast, so it mostly just draws a card later; still worth a slot to occasionally blank a Mutagenic Growth. We need to lower our curve and get to our mana engine faster, so cut the clunkier value cards (Summoner's Pact, some Malevolent Rumble) for cheap interaction that buys time. Amulet of Vigor into bounce lands remains the priority to outrace their clock.

Esper GenericBlink grinds with Thoughtseize, Orcish Bowmasters, and Flickerwisp/Ephemerate value loops, so Stock Up helps us rebuild after discard and find lands through a long game. Force of Vigor can strip an early Overlord of the Balemurk's impending enchantment permanent off the battlefield or hit a problematic enchantment like High Noon if they bring one in, functioning as flexible answer. Summoner's Pact is risky against a deck with proactive discard like Thoughtseize that can strip the tutored threat while you still have to pay the delayed {2}{G}{G}, so trim it along with a Malevolent Rumble for the smoother, more resilient grindy plan.