This is the mirror, so disruption and card advantage matter more than incremental value. Thought-Knot Seer strips their best nonland card on entry and leaves a 4/4 body that trades well with their creatures, though they draw a card when it leaves the battlefield. Pithing Needle can lock down a problematic activated ability like Basking Broodscale's adapt or Shifting Woodland if needed. Cut the slower, lower-impact cards that don't affect the race against a mirrored gameplan.

Rakdos Delirium relies on graveyard synergies like Nethergoyf, Fear of Missing Out's delirium trigger, and Street Wraith/Stitcher's Supplier filling the yard. Grafdigger's Cage stops Nethergoyf from escaping and Detective's Phoenix from being cast from the graveyard, while Soul-Guide Lantern exiles their yard to turn off delirium. Thought-Knot Seer proactively takes their Thoughtseize or removal spell before it can be used on you, while also blocking well against their small creatures. This matchup is more about disruption and life total management against their burn (Lightning Bolt) and edict effects (Flare of Malice) than artifact/enchantment hate, so Boseiju and Blade of the Bloodchief come out as the weakest links: Boseiju's targets here are limited to their enchantment creatures, Mishra's Bauble, and nonbasic lands, and Blade of the Bloodchief is a slow card in a matchup built around disruption.

Esper Control wants to Wrath and counter its way to parity, so Thought-Knot Seer proactively strips Supreme Verdict, Solitude, or a counterspell before they can use it, which is huge against a deck this reliant on specific answers. Oblivion Sower punishes their land-light control shell by stripping lands off the top and ramping you past their answers. Sire of Seven Deaths' Ward—Pay 7 life makes it very hard for them to deal with profitably, and its evasion lets it close games through their blockers. Cut narrow anti-aggro/anti-artifact tools that do nothing here.