As for the two big decks, I guess you could ban Emrakul, the Promised End from GB Delirium, but I'm not even sure how much that would matter

Agna Qel'a Airship Engine Room Arch of Orazca Avishkar Raceway Ballroom Barren Moor Baxter Building Billiard Room Blasted Landscape Boiling Rock Prison Bonders' Enclave Botanical Plaza Bountiful Landscape Canyon Slough Capital City Castle Locthwain Coastal Peak Conqueror's Foothold Conservatory Contaminated Landscape Cryptic Caves Dakmor Salvage Deceptive Landscape Desert of the Fervent Desert of the Glorified Desert of the Indomitable Desert of the Mindful Desert of the True Desolate Lighthouse Dining Room Drifting Meadow Festering Thicket Fetid Pools Fiery Islet Foggy Bottom Swamp Fogwell's Gym Foreboding Landscape Forgotten Cave Fountainport Glittering Massif Grim Backwoods Hall Horizon Canopy Horizon of Progress Indatha Triome Irrigated Farmland Jetmir's Garden Ketria Triome Kitchen Kyoshi Village Library Library of Alexandria Lonely Sandbar Lounge Mariposa Military Base Meditation Pools Minas Tirith Misty Palms Oasis Night Market North Pole Gates Nurturing Peatland Omashu City Perilous Landscape Polluted Mire Racers' Ring Raffine's Tower Rain-Slicked Copse Raugrin Triome Remote Isle Restless Vents Roadside Reliquary Savai Triome

Lunala 218 Staryu Water 50 Smack (20) Solgaleo 219 Starmie Water 90 Wave Splash (40) Solgaleo 220 Gastly Psychic 50 Astonish Flip a coin
Both care about enchantments that enter the battlefield with the whole enchantress archetype that supports it, then you toss in rooms that span the five colors of the wheel and rarity spectrum and you get eerie as an incredible addition from Duskmourn: House of Horror
Position matters in Pokemon TCG numbering, the highest-numbered card is traditionally reserved for the rarest chase
This is insanely powerful in tempo decks and is far more castable than either of the other free counterspells weve looked at