22 cards where the cards are dual lands that filters mana into other colors

Cascade Bluffs (Outlaws of Thunder Junction Commander #276)
Cascading Cataracts (Dominaria United Commander #202)
Crystal Quarry (Dominaria United Commander #206)
Darkwater Catacombs (Outlaws of Thunder Junction Commander #282)
Desolate Mire (Outlaws of Thunder Junction Commander #287)
Ferrous Lake (Outlaws of Thunder Junction Commander #294)
Fetid Heath (Outlaws of Thunder Junction Commander #295)
Fire-Lit Thicket (Double Masters #317)
Flooded Grove (Outlaws of Thunder Junction Commander #297)
Graven Cairns (Double Masters #320)
Mossfire Valley (Murders at Karlov Manor Commander #274)
Mystic Gate (Commander Masters #1013)
Overflowing Basin (Outlaws of Thunder Junction Commander #308)
Rugged Prairie (Outlaws of Thunder Junction Commander #314)
Shadowblood Ridge (Outlaws of Thunder Junction Commander #317)
Skycloud Expanse (Murders at Karlov Manor Commander #294)
Sungrass Prairie (Murders at Karlov Manor Commander #297)
Sunken Ruins (Double Masters #326)
Sunscorched Divide (Outlaws of Thunder Junction Commander #326)
Twilight Mire (Outlaws of Thunder Junction Commander #337)
Viridescent Bog (Outlaws of Thunder Junction Commander #340)
Wooded Bastion (Double Masters #332)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.