Spirit of the Green

Forestwalk, Trample
Spirit of the Green gains +1/+1 for each
Forest you control.
Spirit of the Green gains -1/-1 for each other land
you control that isn't a Forest.
{b/r}{b/r}{u/b}{u/b}{w/b}{w/b}{p/b}{p/b}: Destory Spirit of the
Green, any player may activate this ability