There are simply some places where women are not allowed in the Dark Medieval world. This Gift allows a Black Fury to circumvent those rules; a women might not be allowed to server as a soldier, but a man may do so easily. The Fury using this Gift effectively changes gender in the eyes of onlookers; her features and build become decidedly more masculine, and her garb adapts to that of a man (although of the same social class - a peasant's frock won't become a baron's doublet). Her hair, eye and skin colour remain the same. The end result is a man who shows a slight family resemblence to the Fury, but is a much more effective deceit than a haircut and change of clothes. This Gift is taught by an Ancestor spirit, often one who needed to dress like a man to accomplish her own ends.
The player rolls Charisma + Subterfuge, difficulty 7. The illusion lasts for a scene, or until the Fury shifts form. The change even withstands cursory tactile contact, although heavy or violent contact will reveal the truth. Man's Skin is entirely illusory in nature - as a 'male' the Fury cannot impregnant another woman, nor should she lose her child if pregnant.