Snake skin

It was believed that snakes could be used or both good and evil in magic. Powdered rattlesnake skin, or the rattle itself, was used in spells to bring good luck. Snakeskin was also meant to be able to reverse spell that cause madness. However, people believed that snake blood fed to an enemy would cause snakes to grow inside them. Spells like this have been used in North America and Latin America.