Reptile

At some point - possibly before the death of the Great Kung Lao 500 years ago, or possibly after - Reptile joined Shang Tsung and Goro on Earthrealm. He stayed in hiding. Naturally, when Tsung returned to Outworld, so did Reptile.

He protected his master from harm, and then went on to receive special missions from Shao Kahn himself, who had promised to release the remaining members of his race from slavery if he would unquestioningly do his bidding.

Such an opportunity arose when Kitana had escaped into the unknown regions of Earthrealm during Kahn's invasion of that world. Reptile was sent by Shao Kahn, who promised Reptile to resurrect his race if he succeeded, with Jade to find and, if necessary, kill Kitana. He did not succeed as Jade betrayed him to help Kitana.

After the war was over, with Kahn defeated and both Earth and Edenia free, Reptile was brought back as a prisoner to Edenia, and tried there for genocide, a bitter irony since his own race once was the victim of the very same act. Reptile was then exiled to the Netherealm.

When the fallen Elder God Shinnok invaded Edenia, Reptile grasped the opportunity to join Shinnok's Army of Darkness as a commander, hoping to convince Shinnok to revive his near extinct race. After being on the losing side once more, he escaped into Outworld again and rejoined his old masters, in spite of the fact that neither had ever kept their promises towards him.

The desperate and purposeless Reptile wandered Outworld aimlessly until he came across Nitara yet again. Desperate for a new master Reptile declared his loyalties to Nitara, but unknown to Reptile, he had always been merely a pawn in Nitara's plan to free her people's realm from the Outworld. The first step had been to distract Reptile long enough for the Deadly Alliance to kill Shao Kahn unhindered; next, she manipulated Reptile and the cyber-ninja Cyrax into battle. Reptile damaged Cyrax, ensuring the cyber-ninja would later help Nitara in her quest for the portal sphere. Eventually, Reptile came to realize that Nitara had fooled him, and that her plan had lead to the death of his master Shao Kahn. Enraged, Reptile tracked the vampire and Cyrax to the Lava Chamber, but he was too late. The portal sphere had been destroyed, and of Nitara and Cyrax there was no sign. All that remained was the almost fully incubated dragon egg of Onaga the Dragon King.