Pre-Crisis

Originally living in peace at home, Lilith started to manifest strange mental powers at the age of 13. She read her parents' minds to find she was adopted, then left home to try to find her birth parents. After some trouble, she ended up working as a dancer at the Canary Cottage disco. During this time, she encountered Loren Jupiter, and began to aid him in his cause.^[2]

Soon, Lilith approached the Teen Titans and asked to join. She saw premonitions involving a political figure, who inevitably died, proving her power. She then became a member of the Teen Titans. Once joining the team after her first appearance (Teen Titans #25), she would remain with the team for the remainder of its original run (through Teen Titans #43, first series), as well as guest starring both with and without the team in other DC titles: The Brave and the Bold #94 (in which she is directly responsible for preventing a bombing in Gotham City), Batman #241–242, and World's Finest Comics #205.

Eventually, she left the team and resettled on the West Coast, where she started a new branch of the Titans (known as Titans West). She briefly dated one of her team members, Don Hall (Dove) before leaving him to begin a relationship with the caveman Gnarrk.

Prior to the disbanding of the original Teen Titans and their Titans West counterpart group, Lilith revealed that she had a vision of her teammate Donna Troy (Wonder Girl) marrying a red headed man, who is horrifically murdered along with their child. At the time, Donna was dating her teammate (and red head) Roy Harper. Fearing Lilith's prophecy, Donna broke up with Roy.

Lilith rejoined the team following a reunion with her teammates for the wedding of Donna Troy and Terry Long (who Lilith's prophecy ended up actually referencing). She mentioned that something terrible had happened to Gnarrk, who was not with her at the wedding but would not elaborate. She soon began to be stalked by a mysterious winged creature called Azrael, who sought to make her his mate. However, every time he came near Lilith, she glowed with a previously unseen power. Her fellow Titans blamed Azrael for hurting her and attacked him every chance they got. After revealing to her teammates that she had similar "heat attacks" long before Azrael appeared, she resigned from the Titans in anger.

During the Terror of Trigon storyline (The New Teen Titans (vol. 2) #1–6), Lilith returned to the team as she had become secretly possessed by Azar and sought to get the Titans to help tracking down Raven, who had gone missing. During this adventure, the possessed Lilith arranged the merger of the souls of the residents of Azarath in a successful attempt to cleanse Raven of evil.

Lilith rejoined the team following this adventure, but after Azrael returned, Lilith began manifesting flame-like powers. This was enough to alert Lilith's birth mother, Thia, of her daughter's location. Thia kidnapped Lilith and revealed the truth about her past: Thia had escaped Tartarus, the prison of the Titans of Myth, and began wandering the Earth. She went mad, seducing and murdering wealthy and powerful men in order to gain their wealth and power, as well as spawn many children to do her bidding. Lilith's father was the owner of Sun Publishing, and on their wedding night, Thia burned him alive after Lilith was conceived. After taking over her late husband's company, Thia turned Lilith over to a nurse for care, and the nurse kidnapped her.

The Titans, along with the Amazons, Greek Gods, and the other Titans of Myth, freed Lilith and defeated Thia, who had launched a brutal assault on Olympus and those who followed the Greek Gods. During the battle, Thia's brother and husband, Hyperion sacrificed his life to kill Thia. Afterward, Lilith was offered demigod status by Zeus and a place on Olympus, which she accepted.

Post-Crisis

After the Crisis on Infinite Earths, Lilith was not heard from for a time; however, the mythological Titans (including Thia) showed up in The New Titans #50–54 as a benevolent pantheon and adoptive parents of Donna Troy. This storyline effectively negated Lilith's origin.^[3] Lilith's first post-crisis appearance was a flashback story published in The New Titans #56 which detailed the original Titans first encounter with Gnarrk. Her first proper appearance was in the War of the Gods storyline, allying with the Titans and providing help for them during the crossover.

The New 52

In this new timeline New 52, a passing reference to Lilith is first introduced in Red Hood and the Outlaws as being part of a team with Cyborg, Garth a.k.a. Aqualad, Richard, Garfield and a new unseen character named Dustin, as superhero companions that Starfire seemingly no longer remembers.^[11]

Between her being mentioned in Red Hood and the Outlaws #1 and Titans Hunt #1, DC introduced a character named Omen, who Skitter referred to as Lilith. Omen was a telepath who worked for Harvest and N.O.W.H.E.R.E. and in particular, the bloodsport event known as "The Culling", where teen captives of N.O.W.H.E.R.E. were forced to fight to the death.

Omen was blonde and had her eyes sewn shut; she could create illusions with her psychic powers and control people's thoughts. This made her a valuable member of N.O.W.H.E.R.E., as she enforced Harvest's will amongst his henchmen and prisoners, conditioning and preparing them for the Culling.

Omen reappears in Teen Titans (vol. 4) Annual #3. She appears reformed and her eyes are no longer sewn shut. Harvest tries absorbing her powers as well as those of the other Colony's metahumans into a single weapon only for the Titans to defeat him by blowing up the Colony, sparing Lilith and all the other metahumans present.

With Titans Hunt restoring the original version of the character, the New 52 Omen is now a separate character from Lilith.

DC Rebirth

During DC Rebirth, Lilith later appears in Titans Hunt #1, as a drug counselor who has been secretly keeping tabs on Roy Harper, Donna Troy, Dick Grayson, Mal Duncan and his wife Karen Beecher, Hank Hall, and the caveman hero Gnarrk. It is revealed that along with Lilith, the heroes were the original Teen Titans. The group fell victim to the villain Mr. Twister, who ensnarled them into an occult ritual that threatened the world. The only way to stop the ritual involved erasing all memories the group had of their existence and of each other, which was performed by Lilith. When Mr. Twister resurfaced and restored their memories, Lilith began attempting to gather the Titans together to stop their enemy once and for all.^[12]

Lilith Clay goes by the name Omen in the DC Rebirth comics. She was in the team called Titans, which is composed of former Teen Titans members who are now grown up with Nightwing, Donna Troy, Arsenal, Tempest, and the Wally West version of Flash. When the Speed Force restores the Titan's memories of Wally West, it is shown that Wally and Lilith used to be in a romantic relationship.^[13] Lilith left to pursue a relationship while the team disband shortly afterwards.

Dawn of DC

Still operating as Omen, Lilith has been helping Power Girl cope with her new psionic abilities, and the two have set up a quasi-psychic superhero counseling service in which Omen serves as a guide while Power Girl goes into their clients' mindscapes and punches the problem.^[14]