Volcanic Wind
Mercadian Masques — uncommon
Sorcery
Volcanic Wind rulings:
2004-10-04: The value of X is determined at the time you announce this spell, and you choose the targets and the division of damage among those targets as part of the announcement as well.
2004-10-04: If there are no creatures on the battlefield when you cast this, you do not pick any targets and it deals no damage.