Benefit: You have the option of expending a movement point every time someone moves into your range, or changes a range category relative to you. So for example, if someone moves into Onset to attack you, you may expend and MP to move out of range. This is like Sidestep except without the OA trigger as a requirement. If someone moves from Onset to Melee you may expend an MP to move back to Onset, immediately. If someone moves from Melee to Onset, you may expend an MP to move back to Melee again. Stacks with the SRD Feat Mobility, works well with Distance Fighting.