Cumulative upkeep—Pay and 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
If a land is tapped for mana, it produces instead of any other type.
"I thought the day had brought enough horrors for our ragged band, but the night was far worse."n—Lucilde Fiksdotter, leader of the Order of the White Shield
This effect changes the type of mana produced, but not the amount. For example, if a land that's tapped for mana would add {W}{W}, it adds {B}{B} instead.
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.