Ooze Incubator

Ooze Incubator enters the battlefield tapped.
{t}: Add {1} to your mana pool. If this mana is
used to cast an Ooze creature spell, that creature
enters the battlefield with an additional +1/+1
counter on it.
{g}, {t}: Put a +1/+1 counter on target Ooze you
control at the beginning of the next end step.