The Limbourg Brothers, artists who created a Book of Hours (Tres Riches Heures) for the Duc du Barry in medieval France, depicted Satan as suffering torments, as he inflicted agony on human souls. A perfect image for Halloween. 

This file is approx. 18"x11" (3/4 ratio), at 300 dpi - but it's available in all sizes and resolutions (up to 600 dpi) on request. Just message me - I'll be happy to customize it for you - free of charge. Enjoy !