Have you ever seen Tim Vigil's version of this image? He's done a number of pencil drawings copied from Frazetta covers that are strangely compelling. I saw some of this stuff at a convention; the guy must sharpen his pencil with a laser.
Saw the image you mention, and "strangely compelling" is a great description. You're right, his fine line is amaz'n. Loved his Omen stuff over twenty years ago, and then I kinda lost interest. Diff'rent strokes for diff'rent folks, and all that