This deck does not appear to be legal in Standard (Season from Sep 2021).
Problems: You cannot play more than 4 of: Bonecrusher Giant // Stomp, Mystical Dispute, Heartless Act, Redcap Melee, Goldspan Dragon, Disdainful Stroke, Alrund's Epiphany, Negate, Mazemind Tome, Frost Bite, Brazen Borrower // Petty Theft, Omen of the Sea, Lovestruck Beast // Heart's Desire, Eliminate, Binding the Old Gods, Wolfwillow Haven, The Akroan War, Saw It Coming, Ox of Agonas, Emergent Ultimatum, Elder Gargaroth, Duress, Cultivate, Shark Typhoon, Shadows' Verdict, Expressive Iteration, Edgewall Innkeeper, Test of Talents, Jaspera Sentinel, Glass Casket, Extinction Event, Embercleave, Elite Spellbinder. · Not legal in this format: Bonecrusher Giant // Stomp, Mystical Dispute, Heartless Act, Redcap Melee, Goldspan Dragon, Alrund's Epiphany, Mazemind Tome, Frost Bite, Brazen Borrower // Petty Theft, Omen of the Sea, Lovestruck Beast // Heart's Desire, Eliminate, Binding the Old Gods, Wolfwillow Haven, The Akroan War, Saw It Coming, Ox of Agonas, Emergent Ultimatum, Elder Gargaroth, Cultivate, Shark Typhoon, Shadows' Verdict, Expressive Iteration, Edgewall Innkeeper, Test of Talents, Jaspera Sentinel, Extinction Event, Embercleave, Elite Spellbinder, Shatterskull Smashing // Shatterskull, the Hammer Pass, Scorching Dragonfire, Roiling Vortex, Rimrock Knight // Boulder Rush, Reidane, God of the Worthy // Valkmira, Protector's Shield, Polukranos, Unchained, Koma, Cosmos Serpent, Jwari Disruption // Jwari Ruins, Giant Killer // Chop Down, Galazeth Prismari, Fire Prophecy, Elspeth's Nightmare, Yorion, Sky Nomad, Skyclave Apparition, Selfless Savior, Sea Gate Restoration // Sea Gate, Reborn, Robber of the Rich, Prismari Command, Magda, Brazen Outlaw, Luminarch Aspirant, Drown in the Loch, Drannith Magistrate, Cinderclasm, Boon of the Wish-Giver, Alseid of Life's Bounty, Zenith Flare, Vorinclex, Monstrous Raider, Valki, God of Lies // Tibalt, Cosmic Impostor, Valiant Rescuer, Torbran, Thane of Red Fell, Thieves' Guild Enforcer, The Great Henge, Soul Sear, Soaring Thought-Thief, Showdown of the Skalds, Shadowspear, Seasoned Hallowblade, Ruin Crab, Professor Onyx, Phoenix of Ash, Pelakka Predation // Pelakka Caverns, Merfolk Windrobber, Legion Angel, Klothys, God of Destiny, Kiora Bests the Sea God, Kazandu Mammoth // Kazandu Valley, Kaervek, the Spiteful, Irencrag Pyromancer, Improbable Alliance, Flourishing Fox, Fireblade Charger, Fervent Champion, Esika's Chariot, Drannith Stinger, Cling to Dust, Clarion Spirit, Anax, Hardened in the Forge, Toski, Bearer of Secrets, Skyclave Shade, Rip Apart, Rielle, the Everwise, Quandrix Cultivator, Lurrus of the Dream-Den, Go Blank, Archon of Absolution.