I spent a few more hours cleaning up and synthesizing old public domain sources to try to find some more "evil" monsters for speedstar, to try to fill up the user's request. This one is an evil ghoulish monster.
This is a completely free image Ghoul Head that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.