Dimetria, Harvester of Souls

Flying
{x}{x}{b/r}, {t}: Dimetria deals X damage to any
target. When it dies before your next turn, create
a food token and put a -1/-1 counter on target
creature.
Whenever Dimetria deals any damage to a player,
note how much he or she has taken from it this
game. If it's 16 or more, they lose the game.