User will grow multiple small or medium black wings with feathers that can put anyone under the user's control if hurt by them.
Pros:
-user can fly great heights easily
-user can carry people while flying, but is likely to drop them
-user is immune to all injuries
-user can always fly
Cons:
-user must consume human flesh
-user will never bleed
-user has infinite amount of feathers, moulting will be a living nightmare
-user will fight in an animalistic if unconscious, controlled by their subconscious
Weakness: holy light
User's wings will become useless at coming into contact with holy light, they will also start to vomit if very close to the light source.
They ain't flying into a church