Press the Advantage (Original) p. 93
You shift across the battlefield, timing your movements precisely to avoid any attacks from your foes.
Your sense of the battlefield and intuitive understanding of the ebb and flow of combat allow you to move without dropping your defenses. While others must slowly work through a melee, you seize gaps in a foe's defenses and move with great speed and confidence.
While you are in this stance, you can take a second 5-foot step immediately after you take one for the round. This second movement does not provoke attacks of opportunity. You can make a single 5-foot step into difficult terrain, but if you do, you cannot make the second 5-foot step.