User can turn into shadows

Pros:
-user can change body shape when in shadow from
-user can turn into shadows
-user can create new appendages with shadow form
-user can hide

Cons:
-user's body will always return to normal
-user can't touch others when in shadow form
-user can't control new appendages
-user is completely invisible when hiding

Weakness: direct spot light
User will immediately move and feel pain even in human form