Card text (for the Commander version): "While a friendly ship is attacking a ship, it may spend 1 defense token to reroll any number of dice in its attack pool."
So here's what we know (I think):
- He affects all friendly ships. No range requirement (ala Tantive), no exclusion for the ship he's on (ala Home One).
- He's not limited to the number/color of dice that are rerollable.
- He's not limited to one activation per ship (ala Screed).
- His ability is not explicitly limited to once per attack (although I initially thought there was a card that included that text, and apparently there's not).
So here's my question. Suppose I attack with an ISD with Vader as the commander. I spend 1 defense token to reroll any number of dice, and I'm not satisfied with the result. I have more than one defense token available. Can I spend it to reroll any number of dice again on that same attack roll?
I'm pretty sure the answer is "no," but I'm just trying to make sure. For reference, the "spend 1" restriction is shared by the following cards:
- Screed (though his "spend 1 die" is restricted to "once per activation")
- Defense/Weapon liaisons ("spend 1 command token")
- Sensor Team ("spend 1 die," but limited by an exhaust condition)
- Electronic Countermeasures ("spend 1 token," again limited by an exhaust condition)
- Leading Shots ("spend 1 blue die to reroll any number of dice," the closest corollary to Vader)
- Turbolaser Reroute Circuits ("spend 1 evade token")
Additional cards also reference "change 1 x," which is similar language:
- Sensor Team ("change 1 die," limited by exhaust condition)
- Turbolaser Reroute Circuits ("change 1 die")
- H-9 Turbolasers ("change 1 die")
- Home One ("change 1 die")
- Warlord ("change 1 die face")
Some of these cards have been the subject of an FAQ, but I don't think any of them have addressed how often the ability can be triggered, and can't find anything about that in the Rules Reference Guide.
So, thoughts? Can we agree it's limited to once per attack? If not, what am I missing?