Tectonic Edge
Commander 2014 — uncommon
Land
Tectonic Edge rulings:
2010-03-01: Tectonic Edge’s second ability checks how many lands an opponent controls only at the time you activate the ability.
2010-03-01: Assuming you can activate Tectonic Edge’s second ability, you can target any nonbasic land with it (not just one controlled by an opponent that controls four or more lands).