Edison Format · March 2010
This is a Trigger Effect. It does not target.
If you Summon a monster like "Exiled Force" that has an effect that activates on the field and then activate its effect, it will still be negated. If you Summon a monster like "Sangan" with an effect that activates in the GY, it will not be negated.
This card looks at the ATK of the destroyed monster during damage calculation. If a monster with an original ATK of 0 is destroyed by battle with "Reptilianne Scylla" while its ATK is increased by another effect, you cannot Special Summon it. If a monster whose ATK is being reduced to 0 by an effect like "Twin Swords of Flashing Light – Tryce" is destroyed by battle with "Reptilianne Scylla" you can Special Summon it.