Of the four different frames, the red, green, and blue Hidden Neon versions will only be available in Kamigawa: Neon Dynasty Collector Boosters

Abomination Acolyte of the Inferno Aisling Leprechaun Ashmouth Hound Assembled Alphas Barrow-Blade Basalt Golem Catacomb Dragon Cockatrice Corrosive Ooze Dead-Iron Sledge Deathgazer Dread Specter Dream Fighter Elven Warhounds Engulfing Slagwurm Evil Eye of Urborg Flailing Drake Flameheart Werewolf Goblin Flotilla Gorgon Recluse Grasping Giant Gustcloak Savior Infernal Medusa Inferno Elemental Infinite Authority Kessig Forgemaster Kjeldoran Frostbeast Kolaghan Aspirant Lim-Dl's Cohort Mammoth Harness Mirror Shield Ogre Leadfoot Order of the Alabaster Host Ornery Goblin Phyrexian Reaper Phyrexian Slayer Quagmire Lamprey Rapid Fire Rock Basilisk Sawtooth Ogre Sensei Golden-Tail Skewer Slinger Somberwald Vigilante Stone-Cold Basilisk Sylvan Basilisk Talruum Champion Tangle Asp Thicket Basilisk Tolarian Entrancer Treefolk Mystic Venom Venomous Dragonfly Witherscale Wurm Wizened Githzerai Wooden Stake Zombie Boa

Collector Boosters are the best way to collect variant rares and mythic rares, as well as traditional foil cards, and they're the only place to collect foil-etched and extended-art cards
Interesting New Cards Archmage of Echoes is here to copy your Faerie and Wizard permanent spells
Saheeli currently ranks at the respectable placement of 14th among all Izzet generals on EDHrec, which indicates to me that raw drawing power of Jhoira, Weatherlight Captain has allowed her to be the optimal artifact-matter Izzet commander
Each of these cards are based around 1 of the ally 3 color shards