At 3rd level, a beastbound gains the ability to turn himself into any Small or Medium animal and back again once per day. His options for new forms include all creatures with the animal type. This ability functions like the beast shape I spell, except as noted here. The effect lasts for 1 hour per beastbound level, or until he changes back. Changing form (to animal or back) is a standard action and doesn’t provoke an attack of opportunity. The form chosen must be that of an animal the beastbound is familiar with. 

A beastbound loses his ability to speak while in animal form because he is limited to the sounds that a normal, untrained animal can make, but he can communicate normally with other animals of the same general grouping as his new form. (The normal sound a wild parrot makes is a squawk, so changing to this form does not permit speech.) 

A beastbound can use this ability an additional time per day at 6th level and every two levels thereafter, for a total of seven times at 18th level. At 20th level, a beastbound can use wild shape at will. As a beastbound gains in levels, this ability allows the beastbound to take on the form of larger and smaller animals, magical animals, dire and legendary animals. Each form expends one daily usage of this ability, regardless of the form taken. 

At 6th level, a beastbound can use wild shape to change into a Large or Tiny animal. When taking the form of an animal, a beastbound’s wild shape now functions as beast shape II. 

At 9th level, a beastbound can use wild shape to change into a Huge or Diminutive animal, when taking the form of animals, a beastbound’s wild shape now functions as beast shape III. 

At 12th level, a beastbound can use wild shape to change into an animal and functions as a beast shape IV.