A Panther's Panther. (T'Challa x Reader)

The Soul Stone is passed down from mother to daughter. Only strong women has the ability to wield the stone. This has happened for hundreds of years and for those hundreds of year the Black Panther and all of Wakanda has tried (and succeeded) in keeping the world from knowing they are in possession of the final infinity stone. The stone, however, gives the wielder an ability most wouldn't associate with it. It gives the wielder and the wielders children the ability to turn into a panther. The panther possessing the stone would fight and live most of it's life beside the king.

(The idea of the soul stone only being possessed by women and the plot is of my own creation. I plan for this to go through the Black Panther movie.)