23 cards where the cards aren’t reprints and the mana cost is greater than or equal to {G/U}{G/U}

Cold-Eyed Selkie (Eventide #149)
Murkfiend Liege (Eventide #156)
Biomass Mutation (Gatecrash #213)
Repudiate // Replicate (Ravnica Allegiance #227)
Keruga, the Macrosage (Ikoria: Lair of Behemoths #225)
Spitting Image (Eventide #162)
Drowner of Truth // Drowned Jungle (Modern Horizons 3 #253)
Drowner of Truth // Drowned Jungle (Modern Horizons 3 #253)
Thunderous Snapper (Throne of Eldraine #215)
Pond Prophet (Bloomburrow #229)
Lonis, Genetics Expert (Ravnica: Clue Edition #37)
Overbeing of Myth (Eventide #157)
Fable of Wolf and Owl (Eventide #150)
Gilder Bairn (Eventide #152)
Biomantic Mastery (Dissension #142)
Simic Guildmage (Dissension #148)
Quandrix Pledgemage (Strixhaven: School of Mages #219)
Scuttlegator (Ravnica Allegiance #218)
Manifestation Sage (Strixhaven: School of Mages #205)
Fractal Summoning (Strixhaven: School of Mages #187)
Wistful Selkie (Eventide #165)
Scuttling Sentinel (Ravnica: Clue Edition #42)
Merfolk of the Depths (Gatecrash #221)
Trapjaw Kelpie (Eventide #164)

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