Aegis is the shield of Zeus, which had Medusa's head imprinted on it after Perseus turned over Medusa's head to Athena, who placed it into the Aegis. Some demigods won't even look at the face of Medusa on the shield because it is so terrifying.
When activated, the shield gives off a terrible, fearful aura that forces adversaries away from the shield and the wearer. It provides very good safety for the wielder. It has shown to be extremely durable, more so than ordinary shields.
- There has been given copies of Aegis to favored children of Zeus