Sam Casey is permanently transparent to the visible light spectrum; unfortunately, the condition is damaging to his health. In order to survive, he wears a dampener built in to his wristwatch, which is of Good material strength. He can turn it off to become invisible, but he is limited to fifteen minutes per day; any longer will prove fatal to him.
SCUBA Diving * Martial Arts A
INTERSECT (a top-secret spy organization)
While working underwater on a top-secret government mission, Sam Casey was caught in an explosion. The radiation released by the blast made him invisible; in order to become visible again, he must wear a special watch designed by an INTERSECT scientist.