The Trommites were an alien species native to the planet Tromm in the DC Universe.
The Trommites appear humanoid however they have the ability to transmutate objects into any element.
The species was rendered extinct when they were wiped out by Roxxas and his crew when the Trommites refused to transmute common elements into rare metals and jewels. Jan is the last survivor of the planet Trom and eventually became Element Lad and the leader of the Legion of Superheroes.
- Adventure Comics #307 (1963)