An ion weapon is a type of weapon that utilizes technology to manipulate ions for destructive or offensive purpose. These types of weapons include the ship mounted directed energy weapon known as the ion cannon, developed by the Klingons, as well as the Romulans' more sublime Sunseed program, which is a series of artifical radiation emissions designed to create an ion storm in a pre-selected area of space. (ST video game: Armada; TOS - Rihannsu novel: The Romulan Way)