This provided for a means to use the character in contemporary stories set in the 30th century with the Legion of Super-Heroes. In these stories, Legion member Saturn Girl creates a temporary antidote to his lead poisoning, allowing him to be released from the Phantom Zone for brief periods of time, and he is considered an honorary Legionnaire. Brainiac 5 later creates a long-term antidote (which still requires periodic ingestion), and he becomes a full member. During his long career, he is written as one of the Legion's three most-powerful members along with Superboy and Ultra Boy, and serves two terms as leader. Mon-El apparently dies after failing to take a dose of Brainiac 5's anti-lead serum in a timely fashion. Eltro Gand, a distant descendant of his older brother, sacrificed his life force to restore Mon-El to life. After a long romantic relationship, he and fellow Legionnaire Shadow Lass become husband and wife.