Was field testing Vader as my commander this weekend. After using him, and rerolling some blanks to more blanks, I wondered if I could then, spend an additional token, to reroll even more. In turn, coudl I end up spending all my defense tokens to force a really really good roll?

Based on the wording it doesn't say "only once per combat", but it does mention that I can spend 1 token to reroll any number of dice. I suppose the "1" could be more than JUST the cost, but I just don't see any specific reason why I couldn't trigger vader multiple times in a single shot. Granted I didn't actually play it that way, but I'm curious what you all think. Thanks!

I don't have the exact text of Vader infront of me, but I belive this would be taken care of in the timing rules. Something about an abillity only beeing able to be used once during the event that triggers is. So a "while" abillity, if that is Vaders wording (While attacking you may ...) can only be used once during that event, in this case the attack.

So I would say no to multiple rerolles using Vader during the same attack.

Under effect use and timing:

-a "while" effect can be resolved during the specific event and CANNOT OCCUR AGAIN during that instance of the event.

Vader is a "While" effect and therefore can only be used once per attack and so can only spend 1 defensive token per attack

I don't have the exact text of Vader infront of me, but I belive this would be taken care of in the timing rules. Something about an abillity only beeing able to be used once during the event that triggers is. So a "while" abillity, if that is Vaders wording (While attacking you may ...) can only be used once during that event, in this case the attack.

So I would say no to multiple rerolles using Vader during the same attack.

Bingo. Vader uses the "While" keyword, which limits it to one use per triggering event.

Thanks for the clarification guys! I figured this was the intent, so glad to have the explanation now, just in case I have to explain it to someone else.