Nurgle

Deathtouch
At the beginning of each end step, put a rot counter on each other creature.
Creatures you control get +1/+1 for each rot counter on them.
Creatures you don't control get -1/-1 for each rot counter on them.
{1}{b/g}{b/g}, Sacrifice a creature with one or more rot counters: Draw X cards and lose X life, where X is the number of rot counters on the sacrificed creature.