Mono-Green Eldrazi leans hard on Eldrazi Temple and Ugin's Labyrinth for extra colorless mana to cheat out Emrakul, the Promised End and Ulamog, the Ceaseless Hunger, so Damping Sphere is a premier answer that strips that bonus mana and taxes their multi-spell Green Sun's Zenith/Malevolent Rumble turns. Consign to Memory counters Kozilek's Command outright since it's a colorless instant, and Spell Snare picks off two-mana spells like Fanatic of Rhonas or Malevolent Rumble. Haywire Mite can answer Chalice of the Void or Trinisphere if they bring in artifacts of their own. Trim fetches and surveil-lands since games go long and you want maximum disruption density rather than early tempo lands.