Edison Format · March 2010
Tiger Dragon's effect targets the Set Spell or Trap Card(s).
The effect of "Tiger Dragon" targets the Set Spell or Trap Card(s).
If one of the targets is chained, it cannot be destroyed because it is no longer face-down. If 2 face-down Spell or Trap Cards are targeted and only 1 is chained, the remaining face-down Spell or Trap Card is still destroyed.