The Great Wood Wakes

All lands you control are 1/1 creatures with
reach, menace and indestructible. They are
still lands.
"What Lucy and Susan saw was a dark something
coming to them from almost every direction across the
hills. It looked like a black mist creeping on the
ground, then like stormy waves of a black sea rising
higher and higher as it came on, and then, at last,
like what it was—woods on the move."
Prince Caspian, 11.