Desertification

Place a wastes token on target land. Lands with a wastes token become a basic Wastes (they have "{t}: add {c}" and no other abilities). If target land
was not a basic land, place a wastes token on all
lands that share its name.
"The poison that pervades the lands to our East is not
the result of some natural disaster. I fear it may be a
warning." -Vendethiel