Madness Ridden Overgrowth

Madness Ridden Overgrowth's power and toughness are equal to the number of Forest tapped to cast this spell. If 10 or more
Forest we're used to cast Madness Ridden Overgrowth, Regenerate it at a cost of {g}{g}.
"I saw the whole forest move... Dirt, Roots leaves
and all." - Unknown