The Sword of John the Revelator is an object in DEXTER. The weapon is an ancient artifact that is believed to have belonged to John the Revelator, the man responsible for writing the Book of Revelation. Through the years this blade comes into possession of the University of Tallahassee, where a Professor James Gellar presides as a teacher in religious studies. The sword itself is a rust-stained iron gladius with a golden handle and grip, with slight indentions on both sides of the edge.