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, Lovestruck Beast // Heart's Desire, Mystical Dispute, Heartless Act, Edgewall Innkeeper, Negate, Omen of the Sea, Binding the Old Gods, Goldspan Dragon, Duress, Disdainful Stroke, Alrund's Epiphany, Redcap Melee, Kazandu Mammoth // Kazandu Valley, Glass Casket, Emergent Ultimatum, Embercleave, Eliminate, Cultivate, Brazen Borrower // Petty Theft, Wolfwillow Haven, Shadows' Verdict, Ox of Agonas, Giant Killer // Chop Down, Extinction Event, Elder Gargaroth, The Akroan War, Showdown of the Skalds, Saw It Coming, Robber of the Rich, Frost Bite, Elspeth's Nightmare. · Not legal in this format: Bonecrusher Giant // Stomp, Lovestruck Beast // Heart's Desire, Mystical Dispute, Heartless Act, Edgewall Innkeeper, Omen of the Sea, Binding the Old Gods, Goldspan Dragon, Alrund's Epiphany, Redcap Melee, Kazandu Mammoth // Kazandu Valley, Emergent Ultimatum, Embercleave, Eliminate, Cultivate, Brazen Borrower // Petty Theft, Wolfwillow Haven, Shadows' Verdict, Ox of Agonas, Giant Killer // Chop Down, Extinction Event, Elder Gargaroth, The Akroan War, Showdown of the Skalds, Saw It Coming, Robber of the Rich, Frost Bite, Elspeth's Nightmare, Zenith Flare, Yorion, Sky Nomad, The Great Henge, Startling Development, Soul Sear, Shark Typhoon, Sea Gate Restoration // Sea Gate, Reborn, Scorching Dragonfire, Roiling Vortex, Rimrock Knight // Boulder Rush, Reidane, God of the Worthy // Valkmira, Protector's Shield, Phoenix of Ash, Klothys, God of Destiny, Go for Blood, Flourishing Fox, Fireblade Charger, Fervent Champion, Drannith Stinger, Drannith Magistrate, Boon of the Wish-Giver, Anax, Hardened in the Forge, Valki, God of Lies // Tibalt, Cosmic Impostor, Valiant Rescuer, Torbran, Thane of Red Fell, Thieves' Guild Enforcer, Tangled Florahedron // Tangled Vale, Soaring Thought-Thief, Skyclave Apparition, Shredded Sails, Shatterskull Smashing // Shatterskull, the Hammer Pass, Ruin Crab, Polukranos, Unchained, Mazemind Tome, Koma, Cosmos Serpent, Jwari Disruption // Jwari Ruins, Jaspera Sentinel, Irencrag Pyromancer, Improbable Alliance, Fire Prophecy, Esika's Chariot, Cling to Dust, Clarion Spirit, Behold the Multiverse, Vorinclex, Monstrous Raider, Toski, Bearer of Secrets, Skyclave Shade, Seasoned Hallowblade, Scavenging Ooze, Questing Beast, Merfolk Windrobber, Luminarch Aspirant, Kiora Bests the Sea God, Gemrazer, Drannith Healer, Crippling Fear, Bloodchief's Thirst, Archon of Absolution, Agadeem's Awakening // Agadeem, the Undercrypt, Spikefield Hazard // Spikefield Cave, Soul Shatter, Shadowspear, Rielle, the Everwise, Obosh, the Preypiercer, Lurrus of the Dream-Den, Jegantha, the Wellspring, Erebos's Intervention, Chainweb Aracnir.