Witch Blade.
Legendary cursed sword.
In fact, it is a parasitic life form that can mimic swords and plate armor.
It parasitizes women, absorbs the host's vitality, and converts it into combat ability.
As the number of uses increases, it affects the host's personality, making it more and more cruel and shortening the host's lifespan.
It lives on the host's right hand and looks like a long glove with gems inlaid on the back of the hand. In fact, the gems are the closed eyes of the parasite.
FHD, masterpiece, realistic style.