Canopy Hydra

Canopy Hydra enters the battlefield with a +1/+1 counter on it for each Forest you control.
{t}{2}{g}, put a +1/+1 counter on Canopy Hydra.
When combat damage would be dealt to Canopy Hydra you may choose to prevent all combat damage and remove a +1/+1 counter from Canopy Hydra instead.