[1] Created by writer Jim Shooter and artist Curt Swan, Mordru made his first appearance in Adventure Comics #369 (June 1968).

[2] Originally Wrynn, a scion of a notable family in Gemworld who sought power through black magic, released an entity whom served the Lords of Chaos, Wyrnn's mind was overtaken and replaced with a different being who christened himself as Mordru.

[3] Future accounts of the character later retroactively revealed Mordru to be akin to a parasitic-like cosmic entity who possess hosts.

[4] A sorcerer who often seeks to conquer and amplify his already overwhelming level power, he is frequently recognized as one of the most potent evil wielders of magic in the DC Universe, making him an adversary of many characters and teams, including the Justice Society, Amethyst, Doctor Fate, Justice League Dark, and most notably, the futuristic Legion of Super-Heroes.

Mordru's character has been adapted in various media, including television series such as Legion of Super-Heroes and Justice League Unlimited.

Mordru was originally an energy being who possessed Wrynn, one of the twin sons of Lord Topaz and Lady Turquoise.

[3] Infinite Crisis erases the Gemworld origin and continues Mordru's post-Crisis battles with Doctor Fate and other super heroes.

Instead of possessing Wrynn, Mordru controls the form of sorcerer Arion, and was previously imprisoned in the Rock of Eternity.

Mordru (who inhabits the Earth-One universe) captures members of the JLA and JSA from the 20th century and forces them to retrieve artifacts to free the Demons Three.

[1] With the aid of Eclipso and Obsidian, Mordru tries to conquer the world, but is defeated by Doctor Fate and the Justice Society.

Spectre is seduced by Jean Loring, host of Eclipso, then murders Shazam moments after Mordru escapes.

Mordru, now known as the "Dark Lord", creates an unstoppable, tyrannical space empire by conquering nearby planets.

However, Brainiac 5 notices that the Dark Lord is choosing his conquests carefully "as if selecting baubles from a jeweller's tray", suggesting his power has wavered.

After he defeats the Legion, he reverts to his normal stature to rejoice in his victory, failing to notice that Mon-El and Superboy were not present during the fight.

He opens an outer glass window which lets them see safely inside, but they see Mordru is revived and coming thru the vault side.

Mon-El sounds the alarm and Superboy tries to reach him but is rendered unconscious by Mordru, who has not yet regained his full strength.

When Mon-El destroys the Time Trapper, it disrupts the space-time continuum and reveals a universe in which Mordru does come to power.

The story after Zero Hour has Mordru establishing a large empire in the 28th and 29th centuries before being imprisoned by Mysa (now his daughter rather than his apprentice) in a vault on the Yuen asteroid.

Mordru is released by a mining project on the Yuen asteroid controlled by a group of disgruntled Legion rejects.

[1] The owner of the Eye defends the relic until a Legion led alliance (including Mysa (who is now de-aged), the Workforce, and the Amazers) defeats Mordru and imprisons him in an airtight sphere.

[15] Despite his immense power, Mordru has claustrophobia and cannot properly perform magic when methods such as burial or entrapment are employed.