PFSRD:Confounding Tumble Deed
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Confounding Tumble Deed (Panache)
You can befuddle a foe by striking a blow after tumbling.
Prerequisites: Amateur Swashbuckler feat or panache class feature, Canny Tumble, Acrobatics 7 ranks.
Benefit: When you use Acrobatics to move through an opponent's threatened area or space without provoking an attack of opportunity from that opponent and then hit that foe with a melee attack in the same round, as a free action you can spend 1 panache point to deny that foe its Dexterity bonus to its Armor Class until the end of your next turn.