44 cards where the cards aren’t reprints and the mana cost is greater than or equal to {4}{G}{G}{G}

Craterhoof Behemoth (Avacyn Restored #172)
Nyxbloom Ancient (Theros Beyond Death #190)
End-Raze Forerunners (Ravnica Allegiance #124)
Ezuri's Predation (Commander 2015 #36)
Hornet Queen (Commander 2011 #159)
Ghalta, Stampede Tyrant (The Lost Caverns of Ixalan #185)
Turntimber Symbiosis // Turntimber, Serpentine Wood (Zendikar Rising #215)
Turntimber Symbiosis // Turntimber, Serpentine Wood (Zendikar Rising #215)
Cultivator Colossus (Innistrad: Crimson Vow #195)
Tyrranax Rex (Phyrexia: All Will Be One #189)
Reshape the Earth (Commander Legends #249)
Woodfall Primus (Shadowmoor #135)
Regal Force (Eventide #74)
Worldspine Wurm (Return to Ravnica #140)
Titan of Industry (Streets of New Capenna #159)
Impervious Greatwurm (Guilds of Ravnica #273)
Verdant Force (Tempest #263)
Praetor's Counsel (Mirrodin Besieged #88)
The Tarrasque (Adventures in the Forgotten Realms #207)
Moldgraf Monstrosity (Innistrad #194)
Pelakka Wurm (Rise of the Eldrazi #204)
Fangorn, Tree Shepherd (The Lord of the Rings: Tales of Middle-earth #166)
Molimo, Maro-Sorcerer (Invasion #199)
Myojin of Towering Might (Neon Dynasty Commander #38)
The Great Aurora (Magic Origins #179)
Elderscale Wurm (Magic 2013 #167)
Myojin of Life's Web (Champions of Kamigawa #229)
Plated Slagwurm (Mirrodin #127)
Symbiotic Wurm (Onslaught #289)
Krosan Cloudscraper (Legions #130)
Crush of Wurms (Judgment #110)
Quilled Slagwurm (Mirrodin Besieged #89)
Krosan Colossus (Onslaught #270)
Aetherwind Basker (Aether Revolt #104)
Sekki, Seasons' Guide (Saviors of Kamigawa #148)
Autochthon Wurm (Ravnica: City of Guilds #191)
Chancellor of the Tangle (New Phyrexia #106)
Endless Swarm (Saviors of Kamigawa #129)
Plated Crusher (Battle for Zendikar #183)
Mythic Proportions (Onslaught #274)
Gargantuan Gorilla (Alliances #91)
Stone-Tongue Basilisk (Odyssey #276)
Krosan Groundshaker (Onslaught #271)
Incoming! (Unglued #64)
Uktabi Kong (Unhinged #115)

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