Brotherhood's End comes in as a sweeper against their small creatures. Its 3 damage clears Eldrazi Spawn tokens, Basking Broodscale, Sowing Mycospawn and Haywire Mite, and its other mode destroys cheap artifacts such as Blade of the Bloodchief, Springleaf Drum, Vexing Bauble and Soul-Guide Lantern. Wish is too slow against a deck that can ramp into Emrakul or grind with Kozilek's Command, so one copy comes out. Most of their interaction (Kozilek's Command, Devourer of Destiny's trigger) is colorless, so Veil of Summer, which only grants hexproof from blue and black, does not protect us from it and stays in the sideboard. Focus on racing before they stabilize with Ugin's Labyrinth and big Eldrazi.

Rakdos Delirium is a fast graveyard-fueled aggro deck with Thoughtseize disruption, so we want to maximize our own speed with storm finishers like Grapeshot and Empty the Warrens that can close games before their Nethergoyf and Moonshadow grow out of control. Twinned Vision and one Valakut Awakening are cut since card selection matters less than raw speed here. Their sideboard brings in Unholy Heat, which can hit Ral, Monsoon Mage, and Obsidian Charmaw, a 4/4 flier whose enters trigger destroys a nonbasic land. Since our mana leans on fetchlands and dual lands, keep a basic Mountain available where you can and don't over-rely on a single nonbasic. Race them before delirium turns on and their threats get out of burn range.

Esper Control leans on Orim's Chant and Silence to stop us from casting spells for a turn, and on Solitude to pick off key threats, so avoid overcommitting into a turn where they can blank our spells. Wear // Tear stays in the sideboard: their only artifact is Isochron Scepter, they have no enchantments in the main deck, and Narset and Teferi are planeswalkers, so neither half has real targets. Brotherhood's End is the one bring-in. Its first mode deals 3 damage to each creature and each planeswalker, which can hit Solitude and their planeswalkers (though it may not finish off a freshly resolved one), and its second mode destroys Isochron Scepter. It also damages our own Ral, so sequence it carefully. Artist's Talent is cut as too slow against their countermagic-heavy, tempo-oriented control shell; prioritize efficient, hard-to-interact-with burn to close before Supreme Verdict or Day's Undoing resets the game. Watch out for Force of Negation countering a noncreature spell for free on our turn.