Rock warts, which can also be written as rock-wart, were a type of venomous parasite species that inhabited Tatooine. These creatures possessed a physical structure including eight legs and four eyes. The rock warts native to Tatooine contained a painful neurotoxic venom within their sting and bite. They employed this toxic bite as a means to kill their intended target before depositing their eggs inside the body of his or her. The potency of rockwart venom was such that it could subdue prey significantly larger in size. This venom found application in the creation of a powder favored by assassins.