Yusenya, Plague Bearer

Petrifying Breath-At the beginning of each end
step, put a Acid counter on each creature you
don't control. Creatures you don't control get
-1/-1 for each Acid counter on them. Whenever
a creature you don't control with a Acid counter
on it dies, create a 1/1 green Saproling creature
token.
{b}Sacrifice a Saproling: Put a spore counter on
creatures you control.