This deck does not appear to be legal in Standard (Season from Sep 2021).
Problems: You cannot play more than 4 of: Mystical Dispute, Shark Typhoon, Teferi, Time Raveler, Omen of the Sea, Elspeth Conquers Death, Narset, Parter of Veils, Shatter the Sky, Dovin's Veto, The Birth of Meletis, Fires of Invention, Agent of Treachery, Aether Gust, Omen of the Sun, Lukka, Coppercoat Outcast, Growth Spiral, Bonecrusher Giant // Stomp, Uro, Titan of Nature's Wrath, Glass Casket, Soul-Guide Lantern, Scorching Dragonfire, Flame Sweep, Fervent Champion, Deafening Clarion, Brazen Borrower // Petty Theft. · Not legal in this format: Mystical Dispute, Shark Typhoon, Teferi, Time Raveler, Omen of the Sea, Elspeth Conquers Death, Narset, Parter of Veils, Shatter the Sky, Dovin's Veto, The Birth of Meletis, Fires of Invention, Agent of Treachery, Aether Gust, Omen of the Sun, Lukka, Coppercoat Outcast, Growth Spiral, Bonecrusher Giant // Stomp, Uro, Titan of Nature's Wrath, Scorching Dragonfire, Flame Sweep, Fervent Champion, Deafening Clarion, Brazen Borrower // Petty Theft, Zenith Flare, Witch's Oven, Wilderness Reclamation, Valiant Rescuer, Tin Street Dodger, Startling Development, Scorch Spitter, Redcap Melee, Memory Leak, Light Up the Stage, Heraldic Banner, Grim Initiate, Grafdigger's Cage, Go for Blood, Fry, Frostveil Ambush, Footfall Crater, Flourishing Fox, Expansion // Explosion, Dream Trawler, Drannith Stinger, Drannith Healer, Claim the Firstborn, Cauldron Familiar, Anax, Hardened in the Forge, Yorion, Sky Nomad, Priest of Forgotten Gods, Opt, Nightpack Ambusher, Neutralize, Fight as One, Devout Decree, Boon of the Wish-Giver, Apostle of Purifying Light, Act of Treason, Woe Strider, Tibalt, Rakish Instigator, The Wanderer, Stonecoil Serpent, Shifting Ceratops, Serrated Scorpion, Robber of the Rich, Questing Beast, Phoenix of Ash, Omen of the Forge, Mayhem Devil, Lurrus of the Dream-Den, Lovestruck Beast // Heart's Desire, Legion Warboss, Knight of the Ebon Legion, Gilded Goose, Embereth Shieldbreaker // Battle Display, Dreadhorde Butcher, Chandra, Acolyte of Flame, Blazing Volley, Archon of Sun's Grace, Arboreal Grazer, Tale's End, Spectral Sailor, Risen Reef, Obosh, the Preypiercer, Mythos of Illuna, Kroxa, Titan of Death's Hunger, Knight of Autumn, Kenrith, the Returned King, Irreverent Revelers, Hushbringer, Gutterbones, Gemrazer, Fae of Wishes // Granted, Cavalier of Thorns, Cavalier of Flame.