Omni-Man spots Damien Darkblood, telling him that the ceremony was private. He complains that he never gets invited, but reminded him that he always showed up anyway, adding that he wanted to discover clues and catch the killer, but Omni-Man told him not to pretend to do it because he cared, knowing he only did not want to go home and told him that he had already told Cecil everything he knew. Darkblood repeats that he knew Omni-Man had seen and heard nothing, having been left for dead. Omni-Man asked if he was insinuating something, but Darkblood said that he simply did not understand how to communicate like humans. He was tasked with conquering planets to spread the Viltrumite empire, and arrived on Earth to infiltrate their society to weaken a chance for them to defend themselves. Becoming a writer and superhero named "Omni-Man", Nolan would have a son named Mark Grayson with a human woman named Debbie, who would become a superhero under the moniker "Invincible". Omni-Man would eventually reveal his plans and battled his son after killing the Guardians of the Globe, but would leave the planet due to his love for his son. Nolan would redeem himself and become the emperor of Viltrum after his true heritage was revealed. Things settled down for awhile, and Oliver settled into a comfortable rhythm of studying with his tutor April, spending time with Deborah and fighting crime.Eventually, this pattern was disrupted when Angstrom Levy unleashed a score of corrupt extra dimensional duplicates of his brother Mark. His answer was, “Ever since I became a father, I’ve been looking at the landscape of dads within the superhero universes, and whew... it is bare!! Yet, I was drawn to Omni-Man because of his love for his son. Now, I know folks are looking at this crazy due to that fight between the two, BUT... how did it end? His love for his son compelled him to abandon his mission... betray his people... go against his indoctrination. To me... that’s the embodiment of fatherly love... going against the establishment for the love and wellbeing of your offspring.” During their fight, the dispenser accidentally blasted a full dose of the virus into Mark’s face and immediately stunned the hero.To Oliver’s horror, he had unwittingly infected one of the only people he cared about in the universe with the one thing that was sure to kill him.

The heroes help civilians evacuate while the Twins broke through the walls to make it inside. One of the Twins throws a woman, so Darkwing catches her. However, when they fall to the ground, the Twins throws a tank, which forces him to use his strength to protect them both from being crushed. He was not able to get them both out, but managed to get the woman out using a grappling hook. When it appeared he would be crushed, Omni-Man lifted the tank and helped him get out. It wasn’t long after Mark’s arrival that a trio of Viltrumite warriors arrived, hell bent on wreaking destruction upon the populace and apprehending Nolan.Nolan sent Andressa and the infant Oliver into hiding, while he and Mark battled the invaders.Despite their best efforts, Nolan and Mark were eventually defeated by the invading Viltrumites. Aftermath

DC Universe History

Nolan took on the mission to infiltrate the planet Earth and started his mission by befriending Cecil Stedman to learn about human culture. He took on the surname "Grayson" to appear more human, and Stedman set him up to be "Omni-Man", one of Earth's most powerful superheroes. Oliver raced off to interfere in the battle, initially taking his father’s side until he found out that Nolan was trying to prevent Allen from unleashing the Scourge virus on the Earth. In some ways, Oliver is your typical kid brother.He’s full of energy, enthusiastic, excitable and somewhat naïve to the ways of the world.He hovers off of the ground constantly, and uses phrases like “Hell YEAH!” and “COOL!” when he’s excited about something. Allen and Oliver expected Mark’s response and with that a brief skirmish broke out until Grand Regent Thragg arrived.Thragg had been monitoring Earth space and had detected their arrival.Thragg was too much of a deterrent, and with his arrival the battle halted. Oliver is unique in all of the universe.He is the son of a Viltrumite warrior (Nolan) and a Thraxxan female (his mother Andressa).Viltrumite DNA is unusually aggressive and generally dominant when combined with other species genetic material, but in Oliver’s case it has proven to be less compatible with Thraxxan DNA.

Dominant Genetics: A Viltrumite's genes will override other race's traits for physical appearance and powers. Following the restart of a new timeline, Nolan was once again Omni-Man - Defender of Democracy. After the Flaxan invasion occurred in Saudi Arabia in the new timeline, Nolan discovered that Mark was hiding that his Viltrumite abilities had awakened from him. [51] The alternate Invincibles wreaked havoc and waves of destruction planetwide in the effort to discredit Mark.Presumably, they also were meant to weaken the Earth’s defences in preparation for Angstrom’s final confrontation with the young hero.His body is capable of resisting intense impacts, high calibre gun fire, and extremes in temperature with no outward sign of damage or discomfort.The biochemical processes of his body are so efficient that he could survive for days on a single lungful of air, and in the unusual event that he get injured, he will heal the damage at a superhuman rate.