How does this work with Elizabeth Shelby?
During the Modify Defense Dice step of the Combat Phase, you may re-roll one of your blank results. If you are defending against an attack from a Borg ship, you roll +1 defense die during the Roll Defense Dice step and you may re-roll all of your blank results during the Modify Defense Dice Step
Given a situation where my ship w/ Elizabeth Shelby is attacked by 2 Borg ships and another non-Borg ship:
1) Defending against the first Borg ship I roll +1 defense die and decide to re-roll my blank results
2) What happens during the attack from the second Borg ship? Do I get +1 defense die? Do I get to re-roll one of my blank results? Or do I get no benefit?
3) During the attack from the non-Borg ship, do I get to re-roll one of blank results?