Bloodfell Cavesutility$0.07A nearly identical tapped dual land for black and red, but it produces black and red instead of black and red? Actually it is black/red in a different color pair?
Smoldering Marshutility$0.29A black-red dual land that can enter untapped with the right basic land setup, making it a stronger but still comparable mana fixer.
Foreboding Ruinsutility$1.67A black-red dual land with conditional untapped entry, filling the same fixing role while being faster in some decks.
Jagged Barrensutility$0.43A tapped Rakdos dual land that gives black or red mana and is very close in function as a budget fixing land.
Rakdos Carnariumutility$0.66Provides black-red fixing and effectively replaces itself with a bounce land-style mana advantage in slower decks.
Shadowblood Ridgeutility$0.31A colorless filter land that converts generic mana into black or red, serving as another Rakdos fixing option.
Sulfurous Springsutility$6.51An untapped Rakdos pain land that improves speed at the cost of life, making it a common upgrade over tapped duals.
Dragonskull Summitutility$5.23A premium Rakdos dual land that often enters untapped, giving the same colors with much better tempo.