How would the Shadow Field operate in regards to re-rolls?
My friend plays Dark Eldar, we recently had a game with several of us playing, and were divided on how Shadowfields function in regards to re-rolls.
In case you don't already know, a Dark Eldar Shadow Field confers a 2+ Invul to the bearer, which, if failed, dissipates and has no further effect.
I was of the opinion that, if you fail your save, but have a re-roll and pass said re-roll, for all intents and purposes you have "passed" the save, and the re-roll takes precedence over the previous roll, else you'd have taken a wound if you followed the logic that failing the save and passing it on a re-roll still counts as a failed save. Thus your 2+ Invul would remain, until at a later point you "failed" your save, both the initial roll and the re-roll, thus actually taking damage, which is at least lore-wise, and presumably rule-wise, what it takes to remove the effects of the Shadow Field.