Famine, the Eternal Desert

{b/g} Target creature gets -10/-10 until end of turn
{x}Target creature becomes a 2/2 Black Fly token creature until end of turn
If you control Death, the Grim Horseman, War, the Destroyer Of Armies, and Conquest, the white lamb, this creature gets 20 +1/+1 counters and put 5 3/3 Horsefly creature tokens with flying onto the battlefield.
Get my sickness, and you won't survive a minute.