Mono-Green Eldrazi is a grindy colorless-permanent deck full of Eldrazi Spawn tokens, so your edict effect (Sheoldred's Edict) lines up well against Emrakul and Devourer of Destiny, which your damage-based and low-mana-value removal can't handle. Save Fatal Push and Flame of Anor for their smaller creatures like Basking Broodscale. Counterspell can stop the Eldrazi bodies themselves, though cast triggers like Emrakul's or Devourer's still happen, and Force of Negation answers their noncreature spells such as Kozilek's Command. Lightning Bolt only deals with their smaller creatures and can't answer their bigger Eldrazi, so trim a couple copies. Nihil Spellbomb and Surgical Extraction go after the graveyard that Malevolent Rumble fills, which blunts Emrakul's cost reduction and Shifting Woodland's delirium. Surgical Extraction can also remove every copy of a key card like Emrakul from their graveyard, hand, and library. Cling to Dust's life gain helps against their beaters when you exile a creature card. Keep the rest of the counterspell and removal suite intact since this is primarily a battle of answering their threats before they snowball mana.

This is a combo matchup where Basking Broodscale plus Blade of the Bloodchief generates infinite mana and Spawn tokens, so your plan is to kill Broodscale or strip Blade of the Bloodchief before they go off, or counter the key enabler. Fatal Push answers Broodscale cleanly (mana value 2), and Sheoldred's Edict can force the nontoken sacrifice when Broodscale is their only nontoken creature. Lightning Bolt stays in: it kills Broodscale as a 2/2 and still kills it as a 3/3 after adapt, though not once Blade has stacked more counters on it, so use it early. Counterspell can stop Broodscale or Blade on the stack, and Force of Negation can stop Blade or other noncreature spells for free on their turn, unless a Vexing Bauble is out, since a spell cast for no mana gets countered. Urza's Saga is a land and its chapter III is a triggered ability, so your counterspells can't stop the tutor; deal with the artifact it fetches instead. Nihil Spellbomb can exile their graveyard, and Surgical Extraction can exile every copy of a Broodscale or Blade from their hand and library once one lands in their graveyard, for example off Malevolent Rumble. To make room, cut the slower cards: a Lorien Revealed, a Consult the Star Charts and a Cling to Dust. Keep Flame of Anor in since it can destroy Blade of the Bloodchief directly.

Izzet Prowess is a low-to-the-ground tempo deck full of cheap noncreature spells, making Consign to Memory (which counters colorless spells like Mishra's Bauble and triggered abilities such as prowess, surveil and Flurry triggers) and Mystical Dispute (cheap against their blue Preordain and Expressive Iteration) premium answers. Fatal Push stays in: it destroys Dragon's Rage Channeler, Monastery Swiftspear and Slickshot Show-Off outright, and Mutagenic Growth's +2/+2 does not save a creature from a destroy effect. Instead, make room by cutting slower cards that their fast curve outpaces: Lorien Revealed, Cryptic Command and Cling to Dust. Spell Snare is a reasonable card here but is the most trimmable of the cheap interaction, so cut those copies for the proactive counters. Keep Counterspell, Lightning Bolt, Fatal Push and Flame of Anor as your main interaction since they are efficient, flexible answers to their threats and spells.