: If target Plains is tapped for mana, it produces colorless mana instead of white mana. (This effect lasts indefinitely.)
"O Great Captain, all is lost. They tunneled, they burrowed, they trenched. They sapped the strength of our defenses."n—Sorgus, *Chronicles of the Quarum Plains*
The ability only replaces white mana produced by the Plains. If a Plains somehow tries to produce mana of a different color (for instance, if you control a Joiner Adept), this effect will not cause it to produce colorless mana.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.