Rpg theme, a large prison with dark stone walls covered in moss and slime

rpg theme, a large prison with dark stone walls covered in moss and slime, in the center a metallic structure in the shape of a circle that in the middle of the sides emanates energy that goes to a crystal that is in the center where there is a red woman wearing leather armor with 1 whole horn and another half on her head her eyes are closed as if she were sleeping and her hands rest on her belly, the crystal exudes magic in a dark blue color