There is a key in the lower left hand corner. That tells you there is something more to this picture than the romance of bone. The skull placed on the grave technique will of course only work in private or abandoned cemetaries. Not shown in the picture are candle sticks on either side of the skull. Not because you need light (they wouldn't stay lit anyway). Because the skull will move and with something on either side that can be easily knocked over, you can rule out the wind or wildlife interference. Often a small hole is drilled in the crown of the skull to alter it's gates from 8 to 9. Once a grave is decided upon, the skull is placed at the head of the grave. Return the next day at the same time. Do this for four days. If by then the skull hasn't shown signs of life, move on to another grave. Once you find a grave site where at the skull moves by means other than human (touched by power) you have an active grave you can use for conjuring. Back in 1987 a desent human skull ran $350.00 Now I can't imagine what your head is worth, (wait did I say your head?). Be of good cheer. A reasonable facsimile works just as well. It's just an inert container in and of itself. Since halloween is right around the corner, various replica skulls should be plentyful.