Thread:Paul.rea/@comment-4083360-20141010135350/@comment-4091815-20141010171747

It is on the page in the "appearance" section. The mastery over the body is also discussed in a couple different sections.

I don't think it is a "unique ability" so much as it is something that some individuals are capable. We don't know, besides family connection, what sparks this ability nor do we know for sure if it is extra special or something everyone eventually "evolves" into.

We can only document what we see - and so far we've seen some individuals make a full wolf transformation and that is documented.