Create an epic fantasy book cover featuring Sannrin as the central figure

Create an epic fantasy book cover featuring Sannrin as the central figure. Sannrin is a very young character with the appearance of a 17-year-old. His eyes glow with dark purple magic. In his right hand, he wields dark magic, represented by a swirling mass of shadowy tendrils and electric purple sparks. The magic should look powerful and menacing. The background should feature a dark, mysterious landscape with hints of an ancient, desolate world. The overall atmosphere of the cover should be dark and mystical, with purple and black tones dominating the color palette. Include subtle, golden light elements to contrast the darkness and hint at the presence of light magic. The title of the book should be placed at the top, in a bold, gothic font, and the author's name at the bottom.

worst quality, low quality, bad anatomy, bad hands, bad body, missing fingers, extra digit, fewer digits