Mono-Green Eldrazi is another big-mana ramp deck racing you to giant Eldrazi threats and Fight Rigging value, so the matchup comes down to who assembles their engine first and who can disrupt the other's key enablers. Grafdigger's Cage hurts their Green Sun's Zenith and Malevolent Rumble recursion loops similarly to the mirror-adjacent matchup. Nature's Claim is excellent against their Fight Rigging, a key enchantment enabling free-casting Ulamog or Emrakul. Disruptor Flute can name a problematic card like Fight Rigging or Green Sun's Zenith to tax it out of relevance. Unholy Heat is largely dead since their creatures (Slumbering Trudge 6/6, Fanatic of Rhonas 1/4, Emrakul 13/13) are almost all too tough even with delirium active, so it's better used as more targeted disruption.

Boros Energy is packed with sweepers like Wrath of the Skies and Avengers Disassembled plus efficient removal (Path to Exile, Solitude, Galvanic Discharge, Erode), so going wide into their board wipes is a losing strategy and you need resilience and disruption instead. A second Vexing Bauble is huge here since none of these effects are free to cast, meaning it counters nothing on their side directly, so its real role is protecting your own tempo by forcing them to commit extra mana; more importantly it stops absolutely nothing of theirs, so weigh this against just keeping card quality high — still, four copies help you rebuild after a wipe by taxing their follow-up spells indirectly through mana constraints from their many utility lands. Nature's Claim answers nothing they typically play (no key artifacts/enchantments in their mainboard) so it's a weak addition purely as a hedge against Cori-Steel-style equipment decks; consider it a low-priority swap. Unholy Heat struggles since most of their threats aren't creatures you need to kill (they're the ones killing your creatures), and Blade of the Bloodchief just dies to their many sweepers, so it's cut to reduce blowout risk from Wrath of the Skies and Avengers Disassembled.

Affinity is an artifact-based aggro deck that wants to flood the board with cheap threats like Pinnacle Emissary and Kappa Cannoneer, so cheap removal and targeted artifact hate go a long way. Nature's Claim is excellent against their Mox Opal, Engineered Explosives, or a resolved Weapons Manufacturing engine, gaining you tempo for one mana at instant speed. The extra Unholy Heat gives you efficient removal for their small creatures (Pinnacle Emissary 3/3, Emry 1/2) and even Kappa Cannoneer if delirium is online. A second Vexing Bauble punishes their many zero-cost or improvise spells like Mox Opal activations aren't spells so it mainly stops things like a hard-cast Preordain being free is irrelevant, but it's a fine speculative include against a low-curve deck. Writhing Chrysalis and Haywire Mite are cut since they're too slow against Affinity's explosive starts, and Soul-Guide Lantern/Pithing Needle have minimal impact on their gameplan.