Mono-Green Eldrazi wants to ramp into huge colorless threats like Ulamog, the Ceaseless Hunger and Emrakul, the Promised End, or explode with Fight Rigging triggers; Consign to Memory counters their colorless spells outright, hitting Ulamog, Emrakul, Drowner of Truth, and Eldrazi Spawn-generating triggers. Force of Despair answers a sudden wide board from Fanatic of Rhonas ramp turns or Malevolent Rumble tokens by destroying everything that entered that turn. Trim Faithful Mending and Persist for these proactive answers since this matchup is decided by disrupting their ramp and punishing their biggest turns rather than grinding incremental value.