25 cards where the text includes “changeling” and the colors ≤ GW

Avian Changeling (Modern Masters #6)
Birthing Boughs (Modern Horizons #221)
Bloodline Pretender (March of the Machine Commander #350)
Chameleon Colossus (Forgotten Realms Commander #153)
Changeling Hero (Lorwyn #9)
Changeling Sentinel (Morningtide #6)
Changeling Titan (Lorwyn #200)
Crib Swap (Commander Legends: Battle for Baldur's Gate #690)
Faceless Agent (Jumpstart: Historic Horizons #1)
Game-Trail Changeling (Morningtide #123)
Gladewalker Ritualist (Kaldheim #392)
Guardian Gladewalker (Kaldheim #174)
Impostor of the Sixth Pride (Modern Horizons #14)
Irregular Cohort (Commander Legends: Battle for Baldur's Gate #696)
Littjara Glade-Warden (Kaldheim #182)
Masked Vandal (Kaldheim #184)
Maskwood Nexus (Commander Legends: Battle for Baldur's Gate #865)
Mirror Entity (Outlaws of Thunder Junction Commander #83)
Morophon, the Boundless (Commander Masters #3)
Realmwalker (The Lost Caverns of Ixalan Commander #250)
Shields of Velis Vel (Lorwyn #39)
Universal Automaton (Modern Horizons #235)
Valiant Changeling (Commander Legends: Battle for Baldur's Gate #711)
Webweaver Changeling (Double Masters 2022 #164)
Woodland Changeling (Lorwyn #242)

Though this query has ended, its relics still slumber in New Argive.