Nth-Metal

Nth-Metal is a metal native to Thanagar. Among the unusual properties of the metal is the ability to negate gravity, allowing a person wearing an object made of Nth-Metal; such as a belt, to fly. In addition, the metal can also speed the healing of wounds, increase the wearer's strength, and protects them from the environment and extremes in temperature. The metal also possesses innate anti-magical properties.

In-Game History
In ancient Egypt a Thanagarian spaceship made of Nth-Metal crash-landed, only to be discovered by Prince Khufu and his betrothed, Chay-ara. Constant exposure to the metal forced Khufu and Chay-ara into a cycle of reincarnation. In the 20th century, they were incarnated as Carter Hall and Shiera Saunders, the original Hawkman and Hawkgirl where they wore Nth metal belts, made with the help of the Thanagarian Paran Katar.

Trivia

 * In the future, members of the Legion of Super Heroes wear flight rings made of an alloy of Nth metal called Valorium.
 * Carter and Shiera's son, Hector Hall, made a suit of armor made of Nth metal and took the name Silver Scarab as a founding member of Infinity Inc.