The aniwye can use its action to polymorph into a Large ogre or Huge hill giant, or back into its true form, which is a skunk-like monstrosity. Its statistics, other than its size, are the same in each form, with the exception that only the aniwye's skunk form retains its burrowing and climbing speeds. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.