Kurnoth Hunters have an ability called Tanglethorn Thicket. It allows them to re roll failed armour saves. The main rules state that modifiers are only applied after the re roll.
So is it it correct that the Sylvaneth player would only be able to re roll dice rolls of 1, 2 & 3 and then have modifiers for rend and mystic shield/terrain take effect on the re rolled dice?
Therefore a 4 would be a fail on an unre rolled dice if the attack has rend -1. Can't re roll it because it is not initially a fail, but the -1 rend makes it a fail. So would they they get to re roll it? Which would be after the modifier is applied.