53 cards where the illustration contains “red-mana-symbol”

Ajani Steadfast (Secret Lair Drop #87)
Arcane Endeavor (Forgotten Realms Commander #14)
Cheatyface (Unhinged #30)
Deathmark (Magic 2010 #90)
Enchanted Prairie (Mystery Booster Playtest Cards 2019 #115)
Forest (Outlaws of Thunder Junction #276)
Forest (Phyrexia: All Will Be One #271)
Forest (Phyrexia: All Will Be One #369)
Forest (Dominaria United #281)
Forest (Secret Lair Drop #476)
Forest (Secret Lair Drop #690)
Forest (Secret Lair Drop #243)
Forest (Theros Beyond Death #254)
Giltspire Avenger (Conflux #108)
Green Mana Battery (Legends #279)
Infernal Spawn of Infernal Spawn of Evil (Unhinged #57)
Infernius Spawnington III, Esq. (Unsanctioned #40)
Island (Outlaws of Thunder Junction #273)
Island (Phyrexia: All Will Be One #268)
Island (Phyrexia: All Will Be One #366)
Island (Dominaria United #278)
Island (Secret Lair Drop #240)
Island (Theros Beyond Death #251)
Mana Abundance (Mystery Booster Playtest Cards 2019 #58)
Mishra's Factory (Antiquities #80b)
Mishra's Factory (Antiquities #80c)
Mountain (Outlaws of Thunder Junction #275)
Mountain (Phyrexia: All Will Be One #270)
Mountain (Phyrexia: All Will Be One #368)
Mountain (Dominaria United #280)
Mountain (Secret Lair Drop #242)
Mountain (Theros Beyond Death #253)
Mox Pearl (Vintage Championship #2019)
Piety Charm (Onslaught #49)
Plains (Outlaws of Thunder Junction #272)
Plains (Phyrexia: All Will Be One #267)
Plains (Phyrexia: All Will Be One #365)
Plains (Dominaria United #277)
Plains (Secret Lair Drop #239)
Plains (Theros Beyond Death #250)
Spike, Tournament Grinder (Unstable #69)
Squishy Sphinx Ninja (Unfinity Sticker Sheets #37)
Standard Procedure (Unfinity #287)
Star Compass (Planeshift #134)
Sunscape Familiar (Planeshift #17)
Swamp (Outlaws of Thunder Junction #274)
Swamp (Phyrexia: All Will Be One #269)
Swamp (Phyrexia: All Will Be One #367)
Swamp (Dominaria United #279)
Swamp (Secret Lair Drop #241)
Swamp (Theros Beyond Death #252)
Whammy Burn (Mystery Booster Playtest Cards 2019 #70)
Zombie Fanboy (Unhinged #69)

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