Hikigaeru, Kami of Generosity

When Hikigaeru, Kami of Generosity enters the battlefield, distribute two +1/+1 counters among
up to two target creatures.
Whenever you cast a green spell, put a +1/+1
counter on target creature, it gains trample
until end of turn.
{3}, {t}: Add {g} equal to the number of +1/+1 counters on creatures you control.