Just make it assign a condition card, needs wording tweaks

System Overload

At the beginning of each round assign a weapons disabled token

Action: roll 1 atk die, on a hit or crit remove this condition and a weapons disabled token. (if you have a crew or astromech slot a focus counts as well)

Mag Pule Missile

5pts

Range 2-3. Attack 4

Attack (target lock): Discard this card to perform this attack.

If the attack hits, you may choose to have the defender suffer 2 critical damage or roll 6 red dice. These dice cannot be modified. The defender suffers all hits and crits rolled.