Mono-Green Eldrazi doesn't run many artifacts or enchantments maindeck besides Fight Rigging, but Force of Vigor is still a free, efficient way to strip that enchantment before it lets them cheat Emrakul or Ulamog into play off a big creature. Endurance resets their graveyard right as Malevolent Rumble is trying to fuel their late-game bombs, cutting off graveyard value while leaving a 3/4 reach blocker. Kraul Harpooner is mainly a cheap, resilient body here, though Emrakul is their main flying threat. We shave our narrower interactive options since they don't answer their giant colorless threats efficiently.