Bubbling Muck
Urza's Destiny — common
Sorcery
Bubbling Muck rulings:
2004-10-04: Affects lands with type Swamp, not lands that are named “Swamp.”
2004-10-04: Affects lands tapped for rest of turn, not just swamps on the battlefield at the time it resolves. This is because it affects players and not the lands themselves.