This deck does not appear to be legal in Standard (Season from Sep 2021).
Problems: You cannot play more than 4 of: Mystical Dispute, Teferi, Time Raveler, Shark Typhoon, Elspeth Conquers Death, Omen of the Sea, Shatter the Sky, Narset, Parter of Veils, Aether Gust, Growth Spiral, Fires of Invention, Agent of Treachery, Uro, Titan of Nature's Wrath, Dovin's Veto, The Birth of Meletis, Deafening Clarion, Bonecrusher Giant // Stomp, Scorching Dragonfire, Lukka, Coppercoat Outcast, Omen of the Sun, Negate, Grafdigger's Cage, Glass Casket, Flame Sweep, Brazen Borrower // Petty Theft. · Not legal in this format: Mystical Dispute, Teferi, Time Raveler, Shark Typhoon, Elspeth Conquers Death, Omen of the Sea, Shatter the Sky, Narset, Parter of Veils, Aether Gust, Growth Spiral, Fires of Invention, Agent of Treachery, Uro, Titan of Nature's Wrath, Dovin's Veto, The Birth of Meletis, Deafening Clarion, Bonecrusher Giant // Stomp, Scorching Dragonfire, Lukka, Coppercoat Outcast, Omen of the Sun, Grafdigger's Cage, Flame Sweep, Brazen Borrower // Petty Theft, Zenith Flare, Yorion, Sky Nomad, Witch's Oven, Wilderness Reclamation, Valiant Rescuer, Startling Development, Serrated Scorpion, Neutralize, Legion Warboss, Heraldic Banner, Go for Blood, Frostveil Ambush, Footfall Crater, Flourishing Fox, Drannith Stinger, Drannith Healer, Claim the Firstborn, Cauldron Familiar, Tamiyo, Collector of Tales, Opt, Omen of the Forge, Mythos of Illuna, Memory Leak, Gutterbones, Fry, Fervent Champion, Expansion // Explosion, Drill Bit, Devout Decree, Cry of the Carnarium, Cavalier of Flame, Boon of the Wish-Giver, Arboreal Grazer, Woe Strider, Whisper Squad, Tin Street Dodger, Sphinx of Foresight, Shifting Ceratops, Scorch Spitter, Robber of the Rich, Risen Reef, Redcap Melee, Questing Beast, Priest of Forgotten Gods, Nightpack Ambusher, Mayhem Devil, Lurrus of the Dream-Den, Knight of the Ebon Legion, Knight of Autumn, Kenrith, the Returned King, Hydroid Krasis, Grim Initiate, Fight as One, Dream Trawler, Dreadhorde Butcher, Cavalier of Thorns, Apostle of Purifying Light, Anax, Hardened in the Forge, Act of Treason, Tolsimir, Friend to Wolves, Thassa's Intervention, Storm's Wrath, Spectral Sailor, Phoenix of Ash, Obosh, the Preypiercer, Keruga, the Macrosage, Judith, the Scourge Diva, Irreverent Revelers, Gemrazer, Fae of Wishes // Granted, Embereth Shieldbreaker // Battle Display, Elspeth, Sun's Nemesis, Charming Prince.