A colorless, odorless, and deadly poison from Australia. Westley spent two years building up an immunity to iocaine powder. He uses it to trick Vizzini in their battle of wits. Referred to as among the deadlier poisons known to man. Retrieved from "https://princessbride.fandom.com/wiki/Iocaine_powder?oldid=5278" Categories: Miscellaneous Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.