Venusaur, the Leech Seeder

You may choose not to untap Venusaur,
the Leech Seeder during your untap step.
{2}{b}{g},{t}: Put a -1/-1 counter on target creature
and put a +1/+1 counter on Venusaur. Copy this ability at the beginning of your upkeep if
Venusaur didn't untap during your untap step.
You may choose a new target for the copy.
Even apex predators eventually feed fungus.