When the user enters combat this feat  temporarily increases their Movement Speed and Dexterity depending on the Challenge Rating of the opposing creature or creatures. For Speed if the Challenge Rating is directly adding to the users base Speed, but for the Dexterity increase this feat raises it by the users level minus the opposing creatures. Example: Enemy is 15 CR and Player is Level 7 with a movement speed of 40ft per turn. This feat causes the Dex Score to have 8 added to the base score, and the new movement speed would be 55ft per turn. This effect wears off after combat and groups of creatures have their Challenge Ratings added together then calculated for the buff.