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