Forum:Field Spell Card rulings question

Ok so me and my friend are debating in this situation: There is already a field spell card active, and then my opponent activates his own field spell card and I chain Dust Tornado. What happens afterall? Does my field spell card stay on the field, or are they both destroyed? And what if I had negated it with like Magic Jammer or Cursed Seal of the Forbidden Spell? Oliver Vasquez (talk • contribs) 01:44, December 22, 2010 (UTC)kaibaman54