1966 CE
First Appearance of Ocean Master
Ocean Master debuts in Aquaman #29 as a surface-dweller turned supervillain. He battles Aquaman using magical artifacts. #dc #comics #villain
Chronological Storyline (37 Milestones)
1967 CE
Second Battle with Aquaman
Orm returns in Aquaman #35 to challenge Aquaman again, solidifying his role as a recurring foe. #dc #comics
1969 CE
First Encounter with Justice League
Ocean Master attacks the Justice League of America in JLA #73, showcasing his threat level beyond Atlantis. #dc #justiceleague
1974 CE
Trident of Neptune Introduction
In Aquaman #56, Ocean Master wields the Trident of Neptune, gaining control over the seas. #dc #magic
1984 CE
Retconned as Aquaman's Half-Brother
Aquaman #57 reveals Orm Marius is Aquaman's half-brother, son of Atlan and a human mother. #dc #atlantis
1986 CE
Origin Expanded in Secret Origins #2
Secret Origins #2 details Orm's childhood and resentment toward Aquaman, deepening his villainous motivation. #dc #origin
1988 CE
Briefly Rules Atlantis
Ocean Master usurps the throne of Atlantis and rules for a short time before being overthrown. #dc #king
1991 CE
Background in Atlantis Chronicles
The Atlantis Chronicles series explores Atlantean history, including Orm's role and family lineage. #dc #atlantis
1994 CE
Death of Ocean Master
Ocean Master dies in Aquaman (vol. 5) #0 during a battle, marking his first major death. #dc #death
1998 CE
Resurrection and Return
Orm is resurrected and returns to confront Aquaman in Aquaman (vol. 6) #1. #dc #return
2003 CE
Aquaman (vol. 7) Debut
In the new series Aquaman (vol. 7), Ocean Master appears as a primary antagonist with a revised look. #dc #newseries
2005 CE
Infinite Crisis Cameo
Ocean Master briefly appears during Infinite Crisis as part of the Secret Society of Super Villains. #dc #crisis
2009 CE
Blackest Night: Ocean Master Rises
Orm is resurrected as a Black Lantern in Blackest Night, attacking his brother. #dc #blackestnight
2010 CE
Brightest Day: Return to Life
Ocean Master is fully resurrected after the Black Lantern events, reclaiming his villainy. #dc #brightestday
2011 CE
Flashpoint: King of Atlantis
In the Flashpoint timeline, Orm is King of Atlantis and wages war against the surface world. #dc #flashpoint
2011 CE
New 52: Reintroduction
The New 52 relaunch reintroduces Ocean Master in Aquaman (vol. 7) #1 as a prisoner. #dc #new52
2013 CE
Throne of Atlantis War
In the Throne of Atlantis arc, Ocean Master leads an Atlantean assault on the surface, sparking a major crossover. #dc #throneofatlantis
2013 CE
Joins the Crime Syndicate
During Forever Evil, Ocean Master allies with the Crime Syndicate from Earth-3. #dc #foreverevil
2014 CE
New Origin in Aquaman #31
Aquaman #31 provides a revised origin for Orm in the New 52 continuity. #dc #origin
2015 CE
Secret Society in Forever Evil Aftermath
Ocean Master becomes a member of the Secret Society of Super Villains during the Forever Evil aftermath. #dc #society
2016 CE
DC Rebirth: Return to Form
Ocean Master appears in Aquaman Rebirth #1, re-establishing his rivalry with Aquaman. #dc #rebirth
2017 CE
Aquaman (Rebirth) #1 Fight
In the first arc of Aquaman Rebirth, Ocean Master battles Aquaman again, showcasing his powers. #dc #aquaman
2018 CE
Drowned Earth Crisis
Ocean Master plays a key role in the Drowned Earth event, manipulating the sea gods. #dc #drownedearth
2019 CE
Death in Aquaman #45
Ocean Master is killed in Aquaman (2016) #45 by the demonic forces of the Drowned Earth aftermath. #dc #death
2019 CE
Legion of Doom Member
Ocean Master joins the Legion of Doom in Justice League (vol. 4) #1, serving under Lex Luthor. #dc #legionofdoom
2020 CE
Dark Nights: Death Metal
Ocean Master appears as an undead servant in Dark Nights: Death Metal, part of the Batman Who Laughs' army. #dc #deathmetal
2020 CE
Ocean Master One-Shot
A solo one-shot focuses on Orm's legacy and his role in the DC universe. #dc #solo
2021 CE
Aquaman: The Becoming Cameo
Ocean Master appears in the Aquaman: The Becoming limited series, influencing Jackson Hyde. #dc #aquaman
2021 CE
Infinite Frontier: Shadow War
Ocean Master appears in Infinite Frontier #0, entangled in the Shadow War between Batman and Deathstroke. #dc #infinitefrontier
2021 CE
80th Anniversary Special
Ocean Master features in the Aquaman 80th Anniversary 100-Page Super Spectacular, celebrating his history. #dc #anniversary
2022 CE
Titans United: Ocean Master Assault
Ocean Master attacks the Titans in the Titans United limited series. #dc #titans
2022 CE
Aquamen: The Search for Orm
In the Aquamen series, Arthur and Jackson seek Orm after his disappearance. #dc #aquamen
2023 CE
Parasite-Infected Ocean Master
Ocean Master becomes infected by a Parasite in Batman/Superman: World's Finest #13. #dc #worldsfinest
2023 CE
Amanda Waller's Operation
Ocean Master is captured by Amanda Waller's forces in Knight Terrors and later used as an asset. #dc #knightterrors
2024 CE
Absolute Power: Ocean Master's Role
During the Absolute Power event, Ocean Master sides with the Trinity of Evil against the heroes. #dc #absolutepower
2024 CE
New Ocean Master Series Announced
DC announces a new ongoing series for Ocean Master, exploring his quest for redemption. #dc #newseries
2024 CE
Aquaman: The Lost Kingdom Tie-In
A comic tie-in to the film Aquaman and the Lost Kingdom features Ocean Master's perspective. #dc #aquamanmovie