Kryptonite is a fictional element from Krypton, the home planet of Superman. It is the modern equivalent of Achilles Heel and of Sigfrieds Shoulder. As the older synonyms, it is the vulnerable spot of a hero. The original color is green, but I used artists license. My Kryptonite is blue.

This is a photo of a painting, taken with a moving camera. The camera was moved circular in a up/down motion. The only mixed media tool used was a emboss filter. Otherwise the photo is in its original version.
Sony DSC-H2, f/6.3, 1/8 sec, ISO 80, bias -0.7, focal 6mm, aperture 3, window light, no flash