Etrigan Commission. You can't go past a request for a Jack Kirby character ;D
Thanks to Jason Garrattley of the awesome 'Kirby-Vision' blog for uploading it, via the Jack Kirby Museum and research centre. Stoked!
I try to make sure the image is still "readable" by knocking the lines out. Also, setting it to black and white to check values helps heaps. Still learning, still practicing, soldiering on :)