Black Armors appear to specialize in the shapeshifting and enhancement of their wings.
Wing Mass Enhancement: Black Armors can freely control the shape and hardness of their wings, forming weapons such as swords which boast incredible strength and toughness. They are strong enough to sever a blackout's body just by flying past the target. 
Enhanced Wing Mass Manipulation: Black Armors demonstrate the ability to shapeshift their wings with extreme finesse, allowing them to manipulate the shape of their wings into various types of clothes, shoes and even hairstyles. They are capable of teaching this to other seraphs by touch.