A highly efficient magical crystal designed by Leon De'Martis for use in powering airships. It allows airships to remain in the air for longer periods of time than usual, but requires constant care to maintain its unstable nature.
Though it is a relatively recent invention, the Martis Core has already begun to gain popularity among Aeronauts. However, they are extremely expensive to create, and have a tendency to catastrophically fail if they are improperly cared for.