Last March Of The Ents

Sacrifice X untapped lands you control.
Create X X/X Treefolk creature tokens where
X is equal to the number of lands sacrificed this
way.
"Of course it is likely, my friends, likely enough that
we are going to our doom: the last march of the Ents.
But if we stayed home and did nothing, doom would
find us anyway, sooner or later. ... Now at least the
last march of the Ents may be worth a song."