51 cards where the text includes “add” and the card types include “creature” and the colors is G and the mana value < 3 and it’s legal in Pioneer

Armored Scrapgorger (Phyrexia: All Will Be One #158)
Azusa's Many Journeys // Likeness of the Seeker (Kamigawa: Neon Dynasty #172)
Azusa's Many Journeys // Likeness of the Seeker (Kamigawa: Neon Dynasty #172)
Bayou Groff (Strixhaven: School of Mages #121)
Beastcaller Savant (Battle for Zendikar #170)
Bramble Familiar // Fetch Quest (Wilds of Eldraine #164)
Channeler Initiate (Amonkhet #160)
Citanul Stalwart (The Brothers' War #175)
Deathcap Cultivator (Shadows over Innistrad #202)
Drover of the Mighty (The Lost Caverns of Ixalan Commander #239)
Druid of the Cowl (Core Set 2019 #177)
Elfhame Druid (Dominaria #159)
Elvish Mystic (Commander Masters #284)
Gilded Goose (March of the Machine Commander #299)
Golden Hind (Journey into Nyx #124)
Gyre Sage (March of the Machine Commander #300)
Hardbristle Bandit (Outlaws of Thunder Junction #168)
Hidden Herbalists (Aether Revolt #110)
Honored Hierarch (Magic Origins #182)
Humble Naturalist (Ikoria: Lair of Behemoths #160)
Ilysian Caryatid (Commander Masters #297)
Incubation Druid (March of the Machine Commander #302)
Intrepid Paleontologist (The Lost Caverns of Ixalan #193)
Intrepid Stablemaster (Outlaws of Thunder Junction #169)
Ixalli's Lorekeeper (The Lost Caverns of Ixalan #194)
Jaspera Sentinel (Kaldheim #178)
Leaf Gilder (Jumpstart #408)
Leafkin Druid (New Capenna Commander #299)
Llanowar Elves (Game Night #46)
Llanowar Loamspeaker (Dominaria United #170)
Loam Dryad (Shadows over Innistrad #216)
Lotus Cobra (Zendikar Rising #193)
Manaweft Sliver (Commander Masters #900)
Naga Vitalist (Amonkhet #176)
Orochi Merge-Keeper (Kamigawa: Neon Dynasty #203)
Paradise Druid (Forgotten Realms Commander #165)
Poison Dart Frog (The Lost Caverns of Ixalan #207)
Rattleclaw Mystic (Khans of Tarkir #144)
Reclusive Taxidermist (Innistrad: Crimson Vow #214)
Rootrider Faun (Wilds of Eldraine #182)
Saruli Caretaker (Ravnica Allegiance #139)
Satyr Hedonist (Theros #174)
Scaleguard Sentinels (Dragons of Tarkir #201)
Servant of the Conduit (Kaladesh #169)
Stubborn Burrowfiend (Outlaws of Thunder Junction #184)
Sylvan Caryatid (Theros #180)
Tangled Florahedron // Tangled Vale (Zendikar Rising #211)
Tangled Florahedron // Tangled Vale (Zendikar Rising #211)
Tunnel Tipster (Murders at Karlov Manor #180)
Ulvenwald Captive // Ulvenwald Abomination (Eldritch Moon #175)
Ulvenwald Captive // Ulvenwald Abomination (Eldritch Moon #175)
Vitu-Ghazi Inspector (Murders at Karlov Manor #183)
Whisperer of the Wilds (Double Masters #187)
Woodland Mystic (Core Set 2020 #344)

The arc of my blade has carved a path of light to the end of these results.