World Worm

World Worm's power and toughness are each
equal to the number of lands on the battlefield.
World Worm has trample as long as its
toughness is 10 or greater.
World Worm has indestructible as long as its
toughness is 20 or greater.
"It is what is, and what is is worm"
—Exerpt from the Worm Etchings