During a game over the weekend I ran into a rule I think I handled right. My attacking ship was at long range Red Dice only. I rolled my attack. After the results I can not use Leading shots upgrade b/c I did not have any blue dice to spend b/c they weren't in my pool due to my range.

Had I been at Mid range and able to use Red + Blue dice I would have been able to use Leading shots. After my attack roll I could pick a blue die to remove allowing me to reroll any of my other dice.

"While attacking, you may spend 1 blue die to reroll any number of dice in your attack pool."

Correct.

Leading Shots requires you to Spend a Blue Die.

If you have no blue die to Spend, then you cannot satisfy the requirement to use the Upgrade Card.

One thing that I picked up on is certain upgrade cards, objectives, or titles allow for an addition of any color dice. For example defiance can add a blue for long range shots and with leading shot it can be removed to reroll any dice which is very nice for all those red dice being thrown with ackbar on an Assault cruiser.

Thanks guys. I was thinking about that too Kerg12 there is always next time