Edison Format · March 2010
You can only activate 1 Trigger Effect in your hand per chain. (You can't activate the ① effect of this card more that once per chain, even if you have multiple copies in your hand).
The ① effect does not trigger when a Spell/Trap Effect is negated; it only triggers when the Spell/Trap itself is negated. (Activating a Spell/Trap Card from your hand is a Card Activation. Activating the effect of a Spell/Trap which is already face-up on the field is an Effect Activation).