I have Nevus depigmentosus on my face. Please tell me about any natural cure, even if there is only a slight chance that it works. Please please help?

Forgive my frankness. You won't "cure" it, "naturally" or by grafting or anything else. You can paint it (permanganate, etc.) or cover it up, or you can embrace it. It's distinctively yours, something people use to recognize you, and if you are well-liked, so is the lesion. Ask a few of your friends of each gender how they feel. Some possible partners will love it. "I'm the guy with the lucky spot."