"The Great Darkness Saga" is a five-issue American comic book story arc featuring the Legion of Super-Heroes.

The heroes battle an immensely powerful being shrouded in darkness, ultimately revealed to be the ancient ruler of Apokolips, Darkseid.

In the 30th century, the Legion of Super-Heroes investigate attacks on the Museum of the Mystic Arts and the Tower of London by a group of shadowy thieves.

Through genetic testing, Mon-El and Dream Girl determine that the captured Servant is a clone of Lydea Mallor, Shadow Lass' 20th-century ancestor.

[8] Dream Girl foresees the Servants attacking her sister, the White Witch, on Naltor, and heads to stop them.

Meanwhile, on Earth, Cosmic Boy, Saturn Girl, and Lightning Lad determine that two of the Servants are clones of Superman and one of the Guardians of the Universe.

[11] Before fading away, Highfather summons Superboy and Supergirl to Apokolips, with his power allowing them to maintain their abilities under a red sun.

[12] The Great Darkness Saga was initially rendered non-canon following Zero Hour: Crisis in Time!, which rebooted the Legion's continuity.

A hardcover "Deluxe Edition" was published in November 2010 (ISBN 978-1401229610), including issues before and after the main "Saga" (#284–296 and Annual #1), but excluding the epilogue story and poster.