24 cards where (the mana cost is equal to {X} or the mana cost is equal to {X}{G}) and the card types include “creature”

A-Ochre Jelly (Adventures in the Forgotten Realms #A-196)
Capricopian (Commander 2020 #58)
Chamber Sentry (Jumpstart #461)
Contortionist Troupe (Innistrad: Midnight Hunt #178)
Elusive Otter // Grove's Bounty (Wilds of Eldraine #225)
Endless One (Commander Masters #804)
Feral Hydra (Jumpstart #395)
Goldvein Hydra (Outlaws of Thunder Junction #167)
Haldir, Lórien Lieutenant (Tales of Middle-earth Commander #39)
Hormagaunt Horde (Warhammer 40,000 Commander #93)
Hungering Hydra (Commander 2020 #177)
Ivy Elemental (Ikoria: Lair of Behemoths #161)
Jadelight Spelunker (The Lost Caverns of Ixalan #196)
Knickknack Ouphe (Wilds of Eldraine Commander #18)
Mistcutter Hydra (Theros #162)
Ochre Jelly (Adventures in the Forgotten Realms #196)
Phyrexian Marauder (Visions #151)
Protean Hydra (Magic 2011 #194)
Shifting Wall (Stronghold #140)
Stonecoil Serpent (Commander Masters #976)
Termagant Swarm (Warhammer 40,000 Commander #99)
Ugin's Conjurant (War of the Spark #3)
Wildwood Scourge (Commander Masters #332)
Wren's Run Hydra (Modern Horizons 2 #183)

This search is finished. Now the real work can begin.