Your melee weapons meld into your animal form.
Prerequisite: Beast shape class feature.
When you use your beast shape ability, any melee weapons you are wielding and proficient with meld into your new form. Select one of these weapons; while in your new form, your natural attacks deal the same damage type as that weapon. Your natural attacks also gain all of the weapon’s properties (such as disarm), other than the double weapon property and the fragile weapon property; moreover, when using this feat to grant the trip property to your natural attacks, you gain a +2 bonus on combat maneuver checks to trip an enemy, but you cannot drop your weapon to avoid being tripped due to a failed trip attempt. Weapon Shift does not apply a magic weapon’s enhancement bonus to your natural attacks, nor does it grant your natural attacks any of a weapon’s magical special abilities.