This deck does not appear to be legal in Standard (Season from Sep 2021).
Problems: Not legal in this format: Elvish Piper, Magister Sphinx, Shivan Dragon, Dragonsoul Knight, Two-Headed Dragon, Slumbering Dragon, Stormtide Leviathan, Mana-Charged Dragon, Mordant Dragon, Kilnmouth Dragon, Reya Dawnbringer, Kira, Great Glass-Spinner, Magus of the Moat, Nobilis of War, Jiwari, the Earth Aflame, Aboshan, Cephalid Emperor, Air Servant, Scourge of Kher Ridges, Anavolver, Jace's Mindseeker, Akroma, Angel of Fury, Avatar of Fury, Adarkar Valkyrie, Admonition Angel, Aegis Angel, Aerie Mystics, Angelic Skirmisher, Archangel of Thune, Archon of Redemption, Aurelia, the Warleader, Avacyn, Angel of Hope, Balefire Dragon, Consecrated Sphinx, Demon of Death's Gate, Dragonmaster Outcast, Drogskol Reaver, Furyborn Hellkite, Gisela, Blade of Goldnight, Griselbrand, Conquering Manticore, Hellkite Overlord, Jenara, Asura of War, Kaalia of the Vast, Kargan Dragonlord, Karrthus, Tyrant of Jund, Maelstrom Archangel, Malfegor, Moonveil Dragon, Necropolis Regent, Niv-Mizzet, Dracogenius, Rakdos, Lord of Riots, Scourge of Valkas, Tariel, Reckoner of Souls, Thundermaw Hellkite, Utvara Hellkite, Windreader Sphinx, Birds of Paradise, Blood Tyrant, Bloodline Keeper // Lord of Lineage, Broodmate Dragon, Butcher of Malakir, Chaos Imps, Deathless Angel, Desecration Demon, Djinn Illuminatus, Dominus of Fealty, Draining Whelk, Drana, Kalastria Bloodchief, Falkenrath Marauders, Firemane Avenger, Flameblast Dragon, Hypersonic Dragon, Garza Zol, Plague Queen, Emeria Angel, Hellkite Charger, Boundless Realms, Cultivate, Kodama's Reach, Aether Vial, Gilded Lotus, Belbe's Portal, Dragon Arch, Journeyer's Kite, Summoner's Egg, Chromatic Lantern, Quicksilver Amulet, Deathrender, Tooth and Nail, Wild Pair, Asceticism, Hunting Grounds, Fist of Suns, Gravitational Shift, Clan Defiance, Earthquake, Garruk, Caller of Beasts, Garruk Wildspeaker, Mosswort Bridge, Reliquary Tower.