Ame, Guardian of the Forest

When Ame, Guardian of the Forest enters the battlefield, target a Forest or Mountain you
control. This Land gets "{t}: Add {r}{g}." for as
long as Ame, Guardian of the Forest remains on
the battlefield.
{1}{r}: Ame, Guardian of the Forest gets
+2/+0 until end of turn. Activate this ability only
once per turn.