Giant Frog

{4}{t}: Put a Croak Counter on Giant Frog.
{t}: Put X 0/1 Tadpole tokens onto the battlefield,
where X equals how many Croak Counters are on
Giant Frog. Remove all Croak Counters.
{t}: Put X +1/+1 counters on target creature,
where X equals how many Croak Counters are on
Giant Frog. Remove all Croak Counters.
{t}: Put X -1/-1 counters on target creature,
where X equals how many Croak Counters are on
Giant Frog. Remove all Croak Counters.