The Blackthorn

While The Blackthorn is on the battlefield, each
land an opponent controls becomes a 0/1 creature
with defender that can be attacked as if it was a
planeswalker. Any land affected by this retains all
its original types and abilities. At the end of your
turn, flip The Blackthorn's card over.
"We will make a pire of this city, and there shall be no weeping for its passing, for none will remain to weep."