
The Grandfather |

I have question about Lightning Stance feat. Does this feat grant concealment "before" the character take 2 move actions or withdraw, or "after" such actions? If former interpretation is true, my character can avoid certain AoO from large creature...
I would say you get concealment from the moment you declare your intention to make a double move.
The speed at which you move makes it nearly impossible
for opponents to strike you.
The descriptiontext implies the benefit is simultaneous with your move action.
As for AoO, I think it is more tricky. You are not invisible or out of sight in anyway. Your enemy has the same miss chance (50%) as for total concealment, but nothing aside from that supports that your character has total concealment when using the feat.
I think the best parallel for this feat is the Displacement spell. which reads:
The subject of this spell appears to be about 2 feet away from
its true location. The creature benefits from a 50% miss chance
as if it had total concealment. Unlike actual total concealment,
displacement does not prevent enemies from targeting the
creature normally. True seeing reveals its true location and negates
the miss chance.
Compared to the rules for total concealment:
Total Concealment: If you have line of effect to a
target but not line of sight, he is considered to have total
concealment from you. You can’t attack an opponent that
has total concealment, though you can attack into a square
that you think he occupies. A successful attack into a
square occupied by an enemy with total concealment has a
50% miss chance (instead of the normal 20% miss chance
for an opponent with concealment).
You can’t execute an attack of opportunity against an
opponent with total concealment, even if you know what
square or squares the opponent occupies.
I would rule that you do not actually have total concealment for AoO purposes.
So the enemies may get 50% miss chance, but you would not be exempt from attacks AoO.
The Grandfather |

Thanks to reply.
>AoO
Sorry, my statement might be bit inappropriate, but what I mean was if I get 50% miss chance, I might evade some AoO for 50% of success. I think it's why before or after matters.
I completely agree with that concealment dosen't negate AoO unlike cover.
OK, I agree with you then.
Except. Normally, total concealment (the inability to be seen by your enemy) actually negates AoO.
But in this case all attacks against you in your own turn and until the start of your next turn are subject to 50% miss :)