Dragon King's Army

The Dragon King's Army, also sometimes known as the Army of the Dragon King, is an army of long dead soldiers in samurai uniforms who are native to Outworlders made up of the once powerful empire of Onaga the Dragon King. They are a villainous faction in Mortal Kombat: Deadly Alliance.

Description
Onaga the Dragon King originally formed the army and at that time it was the grandest army that Outworld had ever known; an army so powerful that it won every battle they fought in. When Onaga was betrayed, killed, and assassinated by Shao Kahn, the entire army was entombed along with him after they ritualistically committed mass suicide since his death.

For millennia, this army of undead warriors would remain undiscovered in Onaga's tomb and await his second coming, until centuries later, a Netherrealm sorcerer named Quan Chi discovered their location after his escape from the Netherrealm, and along with the help of another sorcerer of Outworld named Shang Tsung (Shang Tsung himself has the ability to manipulate and steal souls) was able to revive it one by one. The young female fighter named Li Mei with the intention of freeing her home village, entered the Mortal Kombat tournament held by the two sorcerers (calling themselves the Deadly Alliance), only to discover that the tournament itself was a setup all along; the Deadly Alliance was planning to transplant the winner's spirit as the last soul needed to completely revive the Dragon King's lost army. By transplanting the souls of defeated warriors/fighters, including the winner Li Mei's, into the mummified soldiers, the Deadly Alliance succeeded in reviving the Dragon King's army from the dead back to life.

When Li Mei's soul was almost transferred by dark magics of the two devious sorcerers into the mummified remains of one of the soldiers' cadavers against her will, it would seem that both Li Mei and her people are doomed to be slaves, and Li Mei herself would be reborn as a dead soldier, cursed to serve the Deadly Alliance forever. Until her teacher Master Bo' Rai Cho intervened and rescued her before that happened, yet that experience left some strange and strong supernatural influence on Li Mei, one that even draws her to her home world's long-lost king.

Both Quan Chi and Shang Tsung never had the chance to lead the army, however, as Onaga had returned from beyond death to reclaim his empire. Onaga would lose the army as well since Raiden released his godly energy in a tremendous magical explosion that destroyed the army completely. But their master Onaga survived the explosion and continued forward in his quest to reclaiming Outworld, achieve his revenge and complete his evil plan of conquering the realms with the aid of a set of certain treasures with powers beyond comprehension.

After Onaga's eventual defeat, it was revealed that the army was only powerful due to Onaga's ability to constantly resurrect them during battle: whenever a soldier was killed, Onaga would simply cast his magic to reanimate the corpse and it would continue to fight.