Needs review
Source: Dragon Magazine #346

Description: Your exceptional training and dedication has expanded your ability to skirmish while avoiding the enemy's blows

Prerequisites: DEX 13, Skirmish Ability, Acrobatic Skirmisher, Tumble (10 Ranks)

When you successfully make a Tumble check to avoid attacks of opportunity while moving through a square occupied by an opponent, your skirmish damage against that opponent increases by +2d6 points of damage until the beginning of your next turn. This overlaps (does not stack with) the damage increase from Acrobatic Skirmisher.