Invasion of Ikoria and Finale of Devastation vied for the final slot too, but ultimately Chords flexibility in finding combo pieces or protection at Instant speed outweighs the overrun and recursion utility of these spells, at least when were talking about whats an essential tool in a players collection
1 unique card Metal Transport Once during your turn, you may switch your Active [M] Pokmon with 1 of your Benched Pokmon

Etali, Primal Conqueror Etali, Primal Conqueror | Illustration by Ryan Pancoast Commander (1) Battle (2) Invasion of Ikoria Invasion of Zendikar Creature (31) Delighted Halfling Elvish Mystic Goldvein Hydra Ixalli's Lorekeeper Kami of Bamboo Groves Llanowar Elves Ragavan, Nimble Pilferer A-Llanowar Loamspeaker Armored Scrapgorger Belligerent Yearling Drover of the Mighty Gala Greeters Ilysian Caryatid Intrepid Paleontologist Poison Dart Frog Elvish Rejuvenator Gwenna, Eyes of Gaea Nissa, Resurgent Animist Outcaster Trailblazer Tireless Provisioner Topiary Stomper Knight of the Stampede Bonehoard Dracosaur Palani's Hatcher Railway Brawler Earthshaker Dreadmaw Trumpeting Carnosaur Titan of Industry Ghalta, Stampede Tyrant Ulamog, the Defiler Ghalta, Primal Hunger Instant (2) Tamiyo's Safekeeping Archdruid's Charm Sorcery (14) Bushwhack Commune with Dinosaurs Triumphant Chomp Dance of the Tumbleweeds Explore Glimpse the Core Into the North Bala Ged Recovery Brotherhood's End Cultivate Return from the Wilds They Went This Way Migration Path Verdant Rejuvenation Enchantment (9) Utopia Sprawl Azusa's Many Journeys Kenrith's Transformation Up the Beanstalk Wolfwillow Haven Case of the Trampled Garden Garruk's Uprising Tribute to the World Tree Leyline of Abundance Artifact (1) Land (40) Bristling Backwoods Cabaretti Courtyard Cavern of Souls Command Tower Copperline Gorge Forest x16 Mountain x16 Restless Ridgeline Rugged Highlands Wooded Ridgeline Etali, Primal Conqueror decks are ramp-centric, and very direct

This is a card that I expect to see as a one-of in red decks that are occasionally prone to a little bit of mana flood, or simply have to run, say, 22 lands instead of the impossible 21.2 lands