G'Mork, Nothingbringer

Menace, ward {c}{c}
G'Mork's power and toughness are each equal
to the number of Wastes on the battlefield.
Whenever an opponent taps a nonbasic land for
colored mana for their first time each turn, they
sacrifice a nontoken land and create a tapped
Wastes land token. (It has "{t}: Add {c}.")