Eldrazi wants to ramp into Emrakul and Devourer of Destiny while grinding with Eldrazi Spawn tokens; Galvanic Blast comes in to pick off Basking Broodscale, Spawn tokens, and other small creatures cheaply, with Metalcraft upgrading it to 4 damage to handle bigger bodies like Sowing Mycospawn, though it can't kill a 6/6 Devourer of Destiny. Preordain is weaker here since we need action over card selection against a ramp deck that doesn't interact much early. Hurkyl's Recall is a sneaky blowout against Urza's Saga Construct tokens or other artifacts the opponent has resolved, since it returns all artifacts that player owns to their hand. Keep Tormod's Crypt in to strip Malevolent Rumble's milled cards from their graveyard, which also slows Emrakul's cost reduction and Shifting Woodland's delirium. Race aggressively before Emrakul or Sire of Seven Deaths stabilizes the game.

Rakdos Delirium is a graveyard-fueled aggro deck with Nethergoyf, Moonshadow, and Street Wraith that wants to fill its graveyard quickly and curve out with cheap threats and burn. Strix Serenade is strong interaction, countering their Moonshadow or Nethergoyf while leaving them a token that doesn't threaten us as much as the real creature would. Blood Moon is a powerful disruptive threat since their manabase is mostly basics and fetches so it won't be fully blown out, but it can strand any utility lands and slow their mana. Claws of Gix is weak against a deck racing us with efficient burn and threats, and Pithing Needle rarely has a great target here, so both come out. Keep Tormod's Crypt in to strip Street Wraith, Stitcher's Supplier mill fuel, and Nethergoyf's escape resources.

Esper Control leans on free spells (an evoked Solitude) and sweepers (Supreme Verdict, Wrath of the Skies) rather than racing, so our life-gain pieces matter less; cut Claws of Gix and Shadowspear for more proactive value. A second Emry, Lurker of the Loch gives extra value and lets us recast artifacts from the graveyard to rebuild after a wrath. Mystical Dispute is excellent since it costs only {U} against their blue spells like Teferi, Time Raveler, Jace, the Mind Sculptor, and their own counterspells. Play around Teferi, Time Raveler restricting our interaction to sorcery speed, and try to deploy threats before Narset, Parter of Veils limits us to one card drawn each turn.