For years, Kobra wondered whether his martial arts training would work in a real fight. Even though he has been practicing his skills at his New York City karate school, no one was allowed to really hurt each other. So, he went to New York's back alleys in order for him to put his skills to the test.
At first, he started on street gangs. Then, he went to gangbangers and drug dealers. The thrill and excitement of fighting started to consume him, and he started killing his opponents. He continued his killing streak and added looting to his list when he robbed convenience stores and gas stations. Eventually, the New York Police Department caught him. At this point, Kobra had no clue as to how many lives he had destroyed.
When Kobra was being taken downtown, he heard gunfire and officers shouting. Kabal and Kira had found out about him and came to induct him into the new Black Dragon syndicate. After killing the officers and escaping, Kabal took Kira and Kobra to Outworld, where they worked for Havik, the cleric of Chaos who had brought Kabal back from the brink of death.
He appears in Mortal Kombat: Armageddon's Konquest mode, as Taven's first kombatant, protecting a bridge with Kira in the Botan Jungle that Taven needs to cross. Kira abandons Kobra as he starts battling the newcomer, eventually escaping after he fails to stop him.
In Kobra's Armageddon ending, he defeats Blaze and assumes the power of the gods. He further demands that the Elder Gods give him control over all realms. They do so, but insist that he must have a queen to rule alongside him, as every king needs one. Kobra chooses Kira as his queen, and the elder gods transform her into a goddess of death. When Kira kisses Kobra, he is turned into a pile of ashes, as a lesson to all others that make demands of supreme beings like the Elder Gods.
, MK:A) 
