You are able to avoid being attacked while tumbling, even by powerful creatures.
Benefit: Whenever you use an Acrobatics check to move through a threatened square without provoking an attack of opportunity, the DC to 10 + the target’s Base Attack Bonus + the target’s Dexterity modifier. Any other conditional modifiers, like +5 to the DC when moving through an enemy’s space, still apply if applicable.
Normal: Without this feat, to move through a threatened square without provoking an attack of opportunity with Acrobatics, the DC is the target’s CMD (10 + strength modifier + dexterity modifier + size modifier).
Forgotten Core Feats © 2014, Flaming Crab Games; Authors: Alex Abel.