Gorga, Mana Bloom

At the beginning of your upkeep, remove a mana counter from Gorga, Mana Bloom.
{2}, {t}: Add X green mana to your mana pool
where X is equal to the number of forests you
control. Place 2 mana counters on Gorga, Mana
Bloom. Activate only if there are no mana
counters on Gorga, Mana Bloom.