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, Embercleave, Bloodchief's Thirst, Spikefield Hazard // Spikefield Cave, Negate, Shatterskull Smashing // Shatterskull, the Hammer Pass, Robber of the Rich, Primal Might, Lovestruck Beast // Heart's Desire, Kazandu Mammoth // Kazandu Valley, Drown in the Loch, Thieves' Guild Enforcer, Scavenging Ooze, Redcap Melee, Embereth Shieldbreaker // Battle Display, Brazen Borrower // Petty Theft, Thundering Rebuke, Stonecoil Serpent, Soaring Thought-Thief, Questing Beast, Nighthawk Scavenger, Gemrazer, Agonizing Remorse, Agadeem's Awakening // Agadeem, the Undercrypt, Shark Typhoon, Rimrock Knight // Boulder Rush, Merfolk Windrobber, Kroxa, Titan of Death's Hunger, Hagra Mauling // Hagra Broodpit, Garruk's Harbinger, Fervent Champion, Edgewall Innkeeper, Cling to Dust, Anax, Hardened in the Forge. · Not legal in this format: Bonecrusher Giant // Stomp, Mystical Dispute, Heartless Act, Embercleave, Bloodchief's Thirst, Spikefield Hazard // Spikefield Cave, Shatterskull Smashing // Shatterskull, the Hammer Pass, Robber of the Rich, Primal Might, Lovestruck Beast // Heart's Desire, Kazandu Mammoth // Kazandu Valley, Drown in the Loch, Thieves' Guild Enforcer, Scavenging Ooze, Redcap Melee, Embereth Shieldbreaker // Battle Display, Brazen Borrower // Petty Theft, Thundering Rebuke, Stonecoil Serpent, Soaring Thought-Thief, Questing Beast, Nighthawk Scavenger, Gemrazer, Agonizing Remorse, Agadeem's Awakening // Agadeem, the Undercrypt, Shark Typhoon, Rimrock Knight // Boulder Rush, Merfolk Windrobber, Kroxa, Titan of Death's Hunger, Hagra Mauling // Hagra Broodpit, Garruk's Harbinger, Fervent Champion, Edgewall Innkeeper, Cling to Dust, Anax, Hardened in the Forge, Turntimber Symbiosis // Turntimber, Serpentine Wood, The Great Henge, Shredded Sails, Rankle, Master of Pranks, Neutralize, Kargan Intimidator, Into the Story, Frantic Inventory, Extinction Event, Eliminate, Akoum Hellhound, Zareth San, the Trickster, Tymaret Calls the Dead, Torbran, Thane of Red Fell, Swarm Shambler, Skyclave Shade, Ruin Crab, Ram Through, Murderous Rider // Swift End, Mire Triton, Mazemind Tome, Magmatic Channeler, Lofty Denial, Jwari Disruption // Jwari Ruins, Elder Gargaroth, Chainweb Aracnir, Brushfire Elemental, Yorvo, Lord of Garenbrig, Vivien, Monsters' Advocate, Silundi Vision // Silundi Isle, Shatter the Sky, Scorching Dragonfire, Roiling Vortex, Roil Eruption, Ranger's Guile, Phoenix of Ash, Omen of the Sea, Lullmage's Domination, Lotus Cobra, Garruk, Unleashed, Feed the Swarm, Confounding Conundrum, Claim the Firstborn, Ashiok, Nightmare Muse, Yorion, Sky Nomad, Vantress Gargoyle, Ugin, the Spirit Dragon, Skyclave Apparition, Selfless Savior, Relic Robber, Ox of Agonas, Oakhame Adversary, Lurrus of the Dream-Den, Liliana, Waker of the Dead, Klothys, God of Destiny, Giant Killer // Chop Down, Fireblade Charger, Emeria's Call // Emeria, Shattered Skyclave, Drannith Magistrate.