Kobra made his first appearance in Mortal Kombat: Deception. Known for his brutality, he shows his opponents no mercy.
For years, Kobra wondered how effective his skills would be in a real street fight. Unsatisfied with not being able to hurt other fighters at karate school he trained at, he decided take his skills to the street and back allies of New York City. Attacking mainly gang members and drug dealers, at first, he would only defeat his targets. However, over time, the thrill and excitement began to consume him, and he started to kill his opponents, as well.
Eventually, the police would catch up with Kobra, and he was arrested. However, Kabal had learned of Kobra's skill, and wanted to recruit him into the newly reformed Black Dragon organization. Kabal, along with Kira, attacked the police officers and rescued Kobra. The three traveled to Outworld where they served Havik to repay him for nursing Kabal back to health after he was attacked by Mavado.
In Kobra's Mortal Kombat: Armageddon ending, he defeats Blaze and assumes god-like power. He demands the the Elder Gods grant him power over all realms. They agree, however, Kobra must have a queen to rule alongside him. Kobra chooses Kira as his queen, however, they have transformed her into a goddess of death. When Kira and Kobra first kiss, her power kills Kobra and he is turned into a pile of ash.
Alignment:
Alignment: Evil
Mortal Kombat: Deception

I had always wondered if my martial arts training would work in an actual fight. I trained in school for years. I was the best in my class. But we were never allowed to hurt each other -- REALLY hurt each other. How did I know this attack would break an arm? That this one would rupture an organ? I prowled the back alleys of New York in search of an opportunity to put my skills to the test. I needed to know what kombat really was.
I couldn't stop. The thrill of kombat consumed me. I had killed! First it was drug dealers and gangbanger -- it allowed me to justify the violence. I killed for money, looting convenience stores and gas stations. When the law finally caught up with me, I couldn't remember how many had died. Sitting cuffed in the police car, I heard some of the officers shouting and firing their guns. When some chick and a masked guy with bloody hookswords stepped into the light, I knew I was in the company of friends.
Mortal Kombat: Deception

Kabal brought his new recruits to Outworld, where a siege was underway against the Dragon King. Kobra grew impatient. He wanted to join the fray, but Kabal held him back. They were not to attack until the heroes had won.
Once the Dragon King had been defeated, Kabal gave the order to strike the victors. The new Black Dragon tore through their ranks and left no survivors. Kobra began to realize he was going to like being a Black Dragon.
Mortal Kombat: Armageddon

Because of his victory over Blaze, Kobra's strength was increased a thousand-fold. Emboldened, he demanded the Elder Gods declare him Lord of the Realms. They assented, but added that no lord should be without his lady. Kobra chose Kira to rule at his side, and the Elder Gods transformed her into a goddess of death. With a kiss, Kira extinguished Kobra's life force and reduced his body to dust. Let all who would make demands of the Elder Gods beware.