Benefit: When you fight defensively, you gain a +2 circumstance bonus to the attack of opportunity made to stop enemies from moving past you with Stand Still, and the DC of the Acrobatics check to move through a square you threaten or your space increases by 2 until the beginning of your next turn.
Teamwork Benefit: If you’re adjacent to an ally who also has this feat when you fight defensively, your bonus increases to +4, and the DC to move through your space or a square you threaten increases by 4 instead of 2.