Prerequisites: Int 13, Combat Expertise, base attack bonus +6.
Benefit: When making a full attack, if you miss on your first attack, you can forgo making any other attacks for the rest of your turn to reroll that attack at your highest base attack bonus.
At 2nd level, a duelist learns to parry the attacks of other creatures, causing them to miss. Whenever the duelist takes a full attack action with a light or one-handed piercing weapon, she can elect not to take one of her attacks. At any time before her next turn, she can attempt to parry an attack against her or an adjacent ally as an immediate action. To parry the attack, the duelist makes an attack roll, using the same bonuses as the attack she chose to forego during her previous action. If her attack roll is greater than the roll of the attacking creature, the attack automatically misses. For each size category that the attacking creature is larger than the duelist, the duelist takes a –4 penalty on her attack roll. The duelist also takes a –4 penalty when attempting to parry an attack made against an adjacent ally. The duelist must declare the use of this ability after the attack is announced, but before the roll is made.
How do these two abilities interact?
Can the duelist announce his parry as part of his full attack and if his only remaining attack misses reroll that at his highest BAB and still parry? Or does the parry count as an attack?
If it works the duelist could use his parry with his full bab and then attack with his iterative. If he misses he had a reroll at full bab because it is the first attack he makes. is that right?
One reading is that Second Chance doesn't work at all if you give up your first attack to parry. This is because "first attack" means the one at your full BAB with no penalty, not the resolution sequence. Since the "first attack" was not taken, the second (interative) attack does not become the "first attack" despite it resolving first. It would be clearer if they had called "your first attack" "your Primary (not iterative) attack"
I believe, however, that Second Chance can work with Parry if the Duelist uses the first attack to parry. The rerolled attack (the interative attack) is simply rolled again exactly the same as it was when it missed, because Second Chance says "reroll THAT attack". The attack (rerolled or not) was always at full BAB, but it still takes the -5 for being the iterative attack.
Think of it this way; your BAB is the same for all your attacks, but first iterative takes a -5, second interative takes a -10, etc.
Can the duelist announce his parry as part of his full attack and if his only remaining attack misses reroll that at his highest BAB and still parry?
It depends on what second chance means by "first attack." If it means the first attack you actually attempt, then yes, they work. However, if it means the first attack you're eligible to use, AKA the one at highest BAB (or first off-hand, if TWF), then by giving up that attack to parry, you don't get to trigger second chance.
To be more clear, assuming the second interpretation:
If you make a full-attack, and you elect not to take your first attack in order to use Parry, then second chance does nothing, because your first attack didn't miss, it never even happened.
If you make a full-attack, and you actually attempt your first attack, and miss, then use second chance to re-roll the attack, you've forfeited all your other attacks, so you don't have an attack left to give up to use parry.