The following information is based on events in The Secret Society of Seven Sorcerers and contain spoilers.
The throwing spell (Iacio) is a spell that, when cast on someone, throw them backwards through the air. The blast also has a tendency to tear through the body, creating a wound and causing the victim to bleed.
Examples of usage
The incantation iacio is Latin and means, among other things, "throw, hurl, cast, fling; throw away; shoot".