Your search for "Smoldering Marsh 321" revealed the following:
Smoldering Marsh (TRC) from Star Trek Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Enora Mercier Card Text:(T: Add B or R.)This land enters tapped unless you control two or more basic lands.
Smoldering Marsh (OTC) from Outlaws of Thunder Junction Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Adam Paquette Card Text:(T: Add B or R.)Smoldering Marsh enters the battlefield tapped unless you control two or more basic lands....
Smoldering Marsh (Foil) (EXP) from Zendikar Expeditions, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Titus Lunter Card Text:(T: Add B or R to your mana pool.)Smoldering Marsh enters the battlefield tapped unless you control two or...