Cazzbar, Master of Feasts

At the beginning of each opponent's upkeep, that player creates a food token.
At the beginning of your upkeep, create X 1/1
black and green Pest creature tokens with "When
this creature dies, you gain 1 life." where X is the number of food token your opponent's control.
Whenever an opponent gains one or more life
draw a card. This ability triggers only
once per turn.