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, Shatterskull Smashing // Shatterskull, the Hammer Pass, Lovestruck Beast // Heart's Desire, Kazandu Mammoth // Kazandu Valley, Mystical Dispute, Edgewall Innkeeper, Scavenging Ooze, The Great Henge, Ox of Agonas, Heartless Act, Brushfire Elemental, Scorching Dragonfire, Embercleave, Vivien, Monsters' Advocate, Shark Typhoon, Negate, Bloodchief's Thirst, The Akroan War, Skyclave Apparition, Questing Beast, Extinction Event, Elspeth Conquers Death, Cling to Dust, Yorion, Sky Nomad, Omen of the Sea, Mazemind Tome, Klothys, God of Destiny, Fire Prophecy, Emeria's Call // Emeria, Shattered Skyclave, Elspeth's Nightmare, Eliminate, Ugin, the Spirit Dragon, Thieves' Guild Enforcer, Soaring Thought-Thief, Skyclave Shade, Into the Story, Glass Casket, Duress, Drown in the Loch, Doom Foretold. · Not legal in this format: Bonecrusher Giant // Stomp, Shatterskull Smashing // Shatterskull, the Hammer Pass, Lovestruck Beast // Heart's Desire, Kazandu Mammoth // Kazandu Valley, Mystical Dispute, Edgewall Innkeeper, Scavenging Ooze, The Great Henge, Ox of Agonas, Heartless Act, Brushfire Elemental, Scorching Dragonfire, Embercleave, Vivien, Monsters' Advocate, Shark Typhoon, Bloodchief's Thirst, The Akroan War, Skyclave Apparition, Questing Beast, Extinction Event, Elspeth Conquers Death, Cling to Dust, Yorion, Sky Nomad, Omen of the Sea, Mazemind Tome, Klothys, God of Destiny, Fire Prophecy, Emeria's Call // Emeria, Shattered Skyclave, Elspeth's Nightmare, Eliminate, Ugin, the Spirit Dragon, Thieves' Guild Enforcer, Soaring Thought-Thief, Skyclave Shade, Into the Story, Drown in the Loch, Doom Foretold, Wilt, Wicked Wolf, Phoenix of Ash, Gilded Goose, Brazen Borrower // Petty Theft, Agadeem's Awakening // Agadeem, the Undercrypt, Treacherous Blessing, Trail of Crumbs, The Birth of Meletis, Tangled Florahedron // Tangled Vale, Shatter the Sky, Ruin Crab, Robber of the Rich, Rimrock Knight // Boulder Rush, Primal Might, Omen of the Sun, Merfolk Windrobber, Lullmage's Domination, Kroxa, Titan of Death's Hunger, Jwari Disruption // Jwari Ruins, Hagra Mauling // Hagra Broodpit, Genesis Ultimatum, Feasting Troll King, Cultivate, Chainweb Aracnir, Beanstalk Giant // Fertile Footsteps, Agonizing Remorse, Zareth San, the Trickster, Spikefield Hazard // Spikefield Cave, Soul Sear, Solemn Simulacrum, Shredded Sails, Neutralize, Murderous Rider // Swift End, Mire Triton, Llanowar Visionary, Glimpse of Freedom, Fervent Champion, Embereth Shieldbreaker // Battle Display, Elder Gargaroth, Dance of the Manse, Archon of Sun's Grace, Anax, Hardened in the Forge, Torbran, Thane of Red Fell, Rankle, Master of Pranks, Lurrus of the Dream-Den, Kogla, the Titan Ape, Heliod's Intervention, Giant Killer // Chop Down, Gemrazer, Garruk, Unleashed, Garruk's Harbinger, Dream Trawler, Charming Prince, Baneslayer Angel.