Mono-Green Eldrazi wants to attack with Herigast, Erupting Nullkite, Sire of Seven Deaths, and various Eldrazi tokens, so Ensnaring Bridge shuts down their combat step while we keep milling with a naturally low hand size. Extirpate strips copies of Emrakul, the Promised End or Sowing Mycospawn before they can be recast, complementing our maindeck Surgical Extraction. Crypt Incursion is largely dead since few of their creatures die in ways that matter to us, so we trade it and one Surgical Extraction for these more proactive answers.

Boros Energy is a fast aggressive deck full of small attackers like Ragavan, Nimble Pilferer, Ocelot Pride tokens, and Voice of Victory's Warrior tokens, so Ensnaring Bridge is very strong at shutting down their attack step once our hand is low. Surgical Extraction is less impactful against a low-synergy aggro shell.

Affinity is almost entirely artifacts, and Hurkyl's Recall bounces their whole board including Kappa Cannoneer, Mox Opal, and Pinnacle Emissary tokens back to hand, resetting their mana and tempo completely. Nihil Spellbomb answers their own Tormod's Crypt plan against our graveyard-based mill strategy while doubling as a cheap artifact to interact with. Crypt Incursion and Surgical Extraction are weak here since Affinity's graveyard has little relevant to attack, so we cut them for proactive artifact disruption.