This Upgrade Card's effect triggers after rolling the initial attack pool, but before the 'Resolve Attack Effects' step.
The timing window to add the die from this Upgrade Card is shared with
Intel Officer, meaning that you must add the die from this Upgrade Card before resolving additional attack effects. In this case, as the timing window is shared, the attacker may choose to resolve this Upgrade Card's effect or
Intel Officer's effect in either order.
Dice addition effects which may add dice of other colors, such as
Clone Gunners,
Quad Battery Turrets,
Swivel-Mount Batteries,
Dual Turbolaser Turrets, and
Opening Salvo, must be declared after this Upgrade Card’s effect. This means this Upgrade Card may only add dice of a color in the original attack pool, before these upgrades resolve.