This deck does not appear to be legal in Standard (Season from Sep 2021).
Problems: Not legal in this format: Hypergenesis, Pride of the Clouds, Elvish Piper, Magister Sphinx, Two-Headed Dragon, Stormtide Leviathan, Mana-Charged Dragon, Mordant Dragon, Kilnmouth Dragon, Reya Dawnbringer, Kira, Great Glass-Spinner, Magus of the Moat, Jace's Mindseeker, Akroma, Angel of Fury, Avatar of Fury, Adarkar Valkyrie, Aegis Angel, Aerie Mystics, Angelic Skirmisher, Archangel of Thune, Aurelia, the Warleader, Avacyn, Angel of Hope, Balefire Dragon, Consecrated Sphinx, Demon of Death's Gate, Dragonmaster Outcast, Furyborn Hellkite, Gisela, Blade of Goldnight, Griselbrand, Hellkite Overlord, Kaalia of the Vast, Karrthus, Tyrant of Jund, Maelstrom Archangel, Moonveil Dragon, Necropolis Regent, Rakdos, Lord of Riots, Scourge of Valkas, Tariel, Reckoner of Souls, Thundermaw Hellkite, Utvara Hellkite, Windreader Sphinx, Bloodline Keeper // Lord of Lineage, Deathless Angel, Desecration Demon, Dominus of Fealty, Drana, Kalastria Bloodchief, Flameblast Dragon, Hellkite Charger, Boundless Realms, Cultivate, Kodama's Reach, Aether Vial, Gilded Lotus, Belbe's Portal, Chromatic Lantern, Quicksilver Amulet, Mask of Avacyn, Planar Portal, Privileged Position, Lurking Predators, Tooth and Nail, Asceticism, Hunting Grounds, Fist of Suns, Earthquake, Garruk, Caller of Beasts, Garruk Wildspeaker, Command Tower, Kessig Wolf Run, Mosswort Bridge, Reliquary Tower, Rakdos Carnarium, Jungle Shrine, Clifftop Retreat, Reflecting Pool, Sunhome, Fortress of the Legion, Drowned Catacomb, Rootbound Crag, Glacial Fortress, Sunpetal Grove, Dragonskull Summit.