Infertility

Whenever a player taps a land for mana, if that land produces colored mana, it produces {c} instead.
At the beginning of each players upkeep, that player may pay {4}. If they do, ignore this cards effects until the beginning of the next upkeep.
"I came home, and to my surprise, everything was gone. Where there was once bountiful crops, there is
now nothing but ash and dust."