When you change forms, your natural attacks take on not just the physical properties of your weapons, but their magical abilities as well.
Prerequisites: Weapon Shift, beast shape class feature.
BENEFIT
When you apply a melee weapon’s damage type and properties to your natural attacks using the Weapon Shift feat, your natural attacks also gain the weapon special abilities of the weapon, such as the flaming special ability. Improved Weapon Shift does not apply the dancing special ability or any special abilities limited to thrown or ranged weapons, and it does not apply the weapon’s enhancement bonuses to your attacks.