This deck does not appear to be legal in Standard (Season from Sep 2021).
Problems: Not legal in this format: Kruphix, God of Horizons, Aether Web, Aggressive Urge, Aquastrand Spider, Argothian Enchantress, Avenging Druid, Battlegrowth, Berserk, Birds of Paradise, Boreal Druid, Bramblewood Paragon, Briarhorn, Centaur Omenreader, Centaur Rootcaster, Chameleon Colossus, Chlorophant, Citanul Hierophants, Civic Wayfinder, Creeping Mold, Cytoplast Root-Kin, Cytospawn Shambler, Deconstruct, Decree of Savagery, Deep Reconnaissance, Defense of the Heart, Deglamer, Dense Foliage, Desert Twister, Dirtcowl Wurm, Doubling Season, Dowsing Shaman, Dragon Fangs, Earthbrawn, Earthcraft, Elemental Resonance, Elephant Guide, Elven Rite, Elvish Aberration, Elvish Pioneer, Elvish Piper, Emerald Charm, Epic Proportions, Eternal Witness, Explosive Vegetation, Fangren Firstborn, Farseek, Fertile Ground, Fertilid, Fists of Ironwood, Forgotten Ancient, Fyndhorn Elves, Garruk Wildspeaker, Gemhide Sliver, Glissa Sunseeker, Greenseeker, Harrow, Harvester Druid, Hunted Wumpus, Hunting Cheetah, Hunting Moa, Hunting Triad, Hunting Wilds, Hurkyl's Recall, Hystrodon, Ice Storm, Illusionary Mask, Incremental Growth, Indrik Stomphowler, Ivy Elemental, Kavu Primarch, Kavu Titan, Kodama's Reach, Krakilin, Krosan Colossus, Krosan Grip, Aethersnipe, Alexi's Cloak, Annex, Anthroplasm, Aphetto Alchemist, Arcane Denial, Arctic Merfolk, Arcum Dagsson, Aura Flux, Barrin, Master Wizard, Braingeyser, Bribery, Broken Ambitions, Callous Oppressor, Cephalid Constable, Cephalid Pathmage, Cephalid Retainer, Choking Tethers, Chromeshell Crab, Churning Eddy, Cloak of Feathers, Cloak of Mists, Clockspinning, Clone, Cloud of Faeries, Coastal Piracy, Collective Restraint, Concentrate, Condescend, Confiscate, Confound, Consign to Dream, Consuming Vortex, Control Magic, Convolute, Copy Artifact, Coral Trickster, Counterintelligence, Counterspell, Cultural Exchange, Curiosity, Cytoplast Manipulator, Dance of Many, Daring Apprentice, Deflection, Desertion, Diplomatic Escort, Dismal Failure, Dismiss, Dispersal Shield, Disperse, Disrupt, Disruptive Pitmage, Disruptive Student, Divert, Dominate, Dragon Wings, Draining Whelk, Drake Familiar, Dream Leash, Dream's Grip, Dreamscape Artist, Drowned Rusalka, Energy Tap, Enervate, Equilibrium, Ertai, Wizard Adept, Evasive Action, Exclude, Flood, Forbid, Force Spike, Ghost-Lit Warder, Gilded Drake, Govern the Guildless, Guile, Helium Squirter, Hoverguard Sweepers, In the Eye of Chaos, Intervene, Invigorate, Ironshell Beetle, Jolting Merfolk, Jugan, the Rising Star, Keiga, the Tide Star, Kira, Great Glass-Spinner, Kiri-Onna, Edric, Spymaster of Trest, Prime Speaker Zegana, Kiora, the Crashing Wave, Bred for the Hunt, Cytoshape, Fathom Mage, Kiora's Follower, Lorescale Coatl, Master Biomancer, Murkfiend Liege, Mystic Genesis, Mystic Snake, Nimbus Swimmer, Overbeing of Myth, Plaxcaster Frogling, Progenitor Mimic, Prophet of Kruphix, Selkie Hedge-Mage, Shambleshark, Simic Charm, Simic Guildmage, Simic Sky Swallower, Snakeform, Temporal Spring, Trygon Predator, Urban Evolution, Vedalken Heretic, Vigean Hydropon, Vorel of the Hull Clade, Zameck Guildmage, Aether Mutation, Biomantic Mastery, Envelop, Armory of Iroas, Ashnod's Altar, Bident of Thassa, Birthing Pod, Blightsteel Colossus, Blinkmoth Urn, Bow of Nylea, Chariot of Victory, Chimeric Staff, Chimeric Mass, Chromatic Lantern, Citanul Flute, Claws of Gix, Clockwork Beetle, Clockwork Condor, Clockwork Dragon, Clockwork Hydra, Clockwork Vorrac, Cloud Key, Coalition Relic, Coldsteel Heart, Contagion Clasp, Contagion Engine, Copper Myr, Copper Gnomes, Core Prowler, Culling Dais, Darksteel Colossus, Semblance Anvil, Darksteel Ingot, Darksteel Juggernaut, Darksteel Reactor, Dead-Iron Sledge, Darksteel Sentinel, Deathrender, Doubling Cube, Dragon Blood, Dreamstone Hedron, Dross Scorpion, Duplicant, Energy Chamber, Erratic Portal, Etched Champion, Etherium Sculptor, Everflowing Chalice, Eye of Ramos, Fellwar Stone, Fleetfeather Sandals, Gilded Lotus, Glaring Spotlight, Golem Artisan, Gorgon Flail, Grafdigger's Cage, Grim Monolith, Grim Poppet, Guardian Idol, Heartseeker, Helm of Possession, Horn of Ramos, Horned Helm, Inkwell Leviathan, Journeyer's Kite, Kuldotha Forgemaster, Lightning Greaves, Loxodon Warhammer, Magistrate's Scepter, Magma Mine, Mana Crypt, Mana Prism, Manalith, Mask of Avacyn, Master of Etherium, Master Transmuter, Memnarch, Moss Diamond, Necropouncer, Nemesis Mask, Neurok Stealthsuit, Nim Deathmantle, Obsidian Battle-Axe, Opaline Unicorn, Palladium Myr, Paradise Mantle, Pentavus, Phyrexian Altar, Phyrexian Lens, Phyrexian Metamorph, Phyrexian Vault, Pilgrim's Eye, Plague Myr, Power Conduit, Prismatic Lens, Pristine Talisman, Psychosis Crawler, Puppet Strings, Quicksilver Amulet, Quietus Spike, Ring of Kalonia, Riptide Replicator, Runechanter's Pike, Rusting Golem, Scepter of Insight, Scuttlemutt, Serrated Arrows, Sigil of Distinction, Silver Myr, Simic Cluestone, Simic Keyrune, Simic Signet, Sky Diamond, Smokestack, Sol Grail, Sol Ring, Solemn Simulacrum, Spectral Searchlight, Staff of Nin, Star Compass, Strider Harness, Summoner's Egg, Swiftfoot Boots, Sword of Feast and Famine, Sword of Fire and Ice, Sword of Light and Shadow, Sword of Vengeance, Sword of War and Peace, Sylvok Replica, Thran Dynamo, Throne of Geth, Thundering Tanadon, Titan Forge, Trespassing Souleater, Trip Noose, Triskelavus, Triskelion, Tumble Magnet, Umezawa's Jitte, Ur-Golem's Eye, Unwinding Clock, Veilstone Amulet, Vessel of Endless Rest, Wayfarer's Bauble, Whispersilk Cloak, Wizard Replica, Workhorse, Worn Powerstone, Wurmcoil Engine, Aboroth, Zuran Orb.