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.