Mono-Green Eldrazi runs Fight Rigging as a key enchantment engine plus Kozilek's Command graveyard exile, so Force of Vigor is strong at destroying Fight Rigging before it snowballs into a free Ulamog or Emrakul cast, and it can hit two targets like Fight Rigging and a Cavern of Souls-adjacent artifact if needed. Endurance disrupts their Malevolent Rumble/Kozilek's Command graveyard value and can flash in to block Fanatic of Rhonas-fueled threats. We trim Walking Ballista and Strangleroot Geist slightly since their big top-end (Ulamog, Emrakul, Ugin) outclasses small creatures in a stalled board, favoring disruption over incremental damage. Keep the Yawgmoth/Agatha's Soul Cauldron plan as our primary way to close games before they assemble Fight Rigging plus a big threat.

This matchup is a race against their colorless artifact/Eldrazi engine backed by Urza's Saga and Blade of the Bloodchief; Force of Vigor blows up their Agatha's Soul Cauldron-style engines like Blade of the Bloodchief and can also hit an Urza's Saga Construct token before it grows huge. Endurance strips their graveyard of value from Malevolent Rumble while flashing in as a blocker against Glaring Fleshraker. Abrupt Decay is clean, uncounterable removal for Basking Broodscale or Blade of the Bloodchief before it snowballs. Trim slower or clunkier cards like Formidable Speaker and a couple Walking Ballistas since we want to be proactive and disruptive rather than grindy against their go-wide Eldrazi Spawn plan.

Izzet Prowess is an aggressive tempo deck reliant on cheap, free-ish spells (Mutagenic Growth) and burn like Lightning Bolt to close games fast, so Vexing Bauble is excellent since Mutagenic Growth costs no mana and gets outright countered. Abrupt Decay is a clean answer to Dragon's Rage Channeler or Monastery Swiftspear that dodges their limited counterplay. Cut Formidable Speaker and Dredger's Insight since they're too slow against a deck that wants to kill us by turn 4-5 with burn to the face; we need to prioritize cheap interaction and blockers. Keep Orcish Bowmasters in since it punishes their card-draw spells like Preordain, which has them draw an extra card off the top.