Dimir Tempo's countermagic (Force of Will, Daze) is already respected by our hand-disruption plan, but Surgical Extraction lets us proactively strip Nethergoyf or a key cantrip like Brainstorm from their graveyard, hand, and library while also fighting their escape recursion. Feed the Swarm is a sorcery, so it only answers a resolved creature such as Orcish Bowmasters, Bilbo, Nethergoyf, or Moonshadow on our own turn, and we lose life equal to its mana value. Kaito is only a creature on its controller's turn, so it is never a legal target. We trim the Cabal Ritual since we're less reliant on a huge ritual turn against a deck that is fighting on the stack rather than racing us, and cut two Duress since Thoughtseize and the remaining Duress copies still cover the discard duty we need pre-combo.

Ocelot Pride Midrange goes wide fast with Ocelot Pride and Ajani, Nacatl Pariah tokens, and Orcish Bowmasters punishes our extra card draws, so Feed the Swarm is excellent removal for Ajani, Nacatl Pariah or Guide of Souls before the token engine snowballs. Grafdigger's Cage is a low-cost inclusion that stops any creature recursion plans from Karakas-adjacent value lines without hurting our own mana. We trim one Mishra's Bauble to reduce free Orcish Bowmasters triggers and cut a Cabal Ritual since our clock needs to be faster than grinding through their board, not bigger.

Izzet Delver is a fast tempo-aggro deck with Dragon's Rage Channeler and Murktide Regent, protected by Force of Will and Daze, so discard that can't take a threat is weaker here. Surgical Extraction can target a Lightning Bolt or other instant or sorcery in their graveyard and exile every copy from their graveyard, hand, and library, both slowing their clock and denying Murktide Regent's delve-based size. We cut Duress since it can only take noncreature, nonland cards and can never touch Dragon's Rage Channeler or Murktide Regent, keeping Thoughtseize for its ability to take any nonland card from their hand, including a threat, before they can protect it.