Biomech skull - only three liner work #tattooartist #tattoos #blackandgreytattoo #tattoo #picoftheday #pictureoftheday #blackandwhite #blackandgreytattoo #horror#horrortattoo #nerd #nerdtattoo #comic #comictattoo #marvel #marveltattoo #dc #dctattoo #drawings_academy #biomechanicaltattoo #skulltattoo #skull #biomechanics