Mono-Green Eldrazi relies on a swarm of cheap colorless permanents (Eldrazi Spawn tokens, Urza's Saga constructs, Basking Broodscale) that Brotherhood's End's 3-damage-to-all-creatures mode sweeps efficiently. Its artifact mode also cleans up cheap artifacts like Springleaf Drum and Talisman of Resilience. Keep in mind it hits every creature and planeswalker, including your own, so plan around Wrenn and Six, Teferi, and your small tokens. High Noon does little here since the opponent isn't trying to chain many cheap spells in a turn, so it comes out. Surgical Extraction can strip a second Emrakul, the Promised End or Devourer of Destiny once one hits the graveyard, for example when Malevolent Rumble puts it there. Keep Leyline Binding in as an answer to their top-end threats once they land, and Prismatic Ending for their cheap permanents like Basking Broodscale. Neither can answer Urza's Saga, since it is a land and both only hit nonland permanents.