Sporecap Canopy

{t}: Add {c} to your mana pool.
{t}: Put a spore counter on target creature.
{2}{b}{g}, {t}, Sacrifice Sporecap Canopy: Destroy
each non-Fungus, non-Saproling creature that
has a number of spore counters on it greater
than its toughness. Activate this ability only
during your upkeep.