Act as a dark fantasy illustrator with 10+ years of experience in gothic and mythical art. Create a detailed sketch of a [HANDSOME YOUNG PRINCE] mid-transformation into a [FEROCIOUS, SHADOW-LACED BEAST] under the pale glow of a [FULL MOON]. Emphasize the agony in his human eyes, the elongation of his limbs into claws, and the tattered remnants of his royal attire. The background should feature a [CRUMBLING CASTLE] or [ENCHANTED FOREST], with eerie mist curling around his form. Use a mix of fine linework and heavy shading to capture the duality of beauty and horror. Include symbolic details like a [BROKEN CROWN] or [CURSED AMULET] to hint at the story behind his curse.