The Corruption

At the beginning of your upkeep, sacrifice a land. Then create a Corruption token — a land with: “{T}: Add {B} or {C}. If you control three or more Corruption lands, you may pay {2}{B} and tap this land: Create a 2/2 black Horror creature token named Eater of Souls with deathtouch.” If you control six or more Corruption lands, The Corruption deals 2 damage to each opponent at the beginning of your end step. If you control ten or more Corruption lands, sacrifice The Corruption: Destroy all nonland permanents. Each opponent loses life equal to the number of permanents they controlled that were destroyed this way.