He and his brother fought alongside their father and the dragons Orin and Caro, repelling an attempted invasion by Shao Kahn.
With Shao Kahn's threat still looming, Daegon and his brother Taven were put in a contest by their parents, Argus and Delia. They were put to a long sleep and were to be awakened by their guardian dragons when the time for the quest to begin would come. Daegon awoke prematurely due to an error committed by his guardian dragon Caro, who lost mental contact with Blaze and mistakenly believed that to be the signal to release Daegon. Daegon became unbalanced by the early awakening, and confronted his parents about the true nature of the quest. He enlisted the help of Shinnok, who manipulated him, telling him that his parents were aiding his brother.
Once he found out what he needed, he killed his parents and formed the Red Dragon Clan, whose primary objective was to find Blaze. In later years using the DNA of Caro, whom he had imprisoned, to create human-dragon hybrids, and using the dragon's ability to create portals to transport his clan anywhere they needed to go. The quest required that both brothers took a weapon that was given to them by their father (the Drakeswords) and a gift from their mother (their armor). When Daegon made it to the temple of where the swords were, he took them both.
When Taven was awakened, Daegon used his Red Dragon troops in an attempt to eliminate his brother. Taven chased Daegon down to the Netherrealm, but left without finding him. Shinnok had lied to him, telling him that Daegon had already left the realm.
Eventually Taven and Daegon reached Edenia, where they fought for the right to contest Blaze. Daegon lost the battle, even after all his work to surpass his older brother. Daegon would join the Forces of Darkness and would then die along with the other kombatants in the final battle.
- Armageddon: "Wounded, Daegon followed Taven to the pyramid. As Taven battled Blaze, Daegon stabbed the fire elemental from behind with the sword I had left him. Thus through treachery did Daegon complete the quest. But before he could savor his victory, the pyramid shook and a recess opened, revealing the parents he had murdered: Delia and myself. We were in fact still alive, our deaths feigned in an elaborate test created to reveal the true nature of our sons. It is clear that Taven possesses the virtue required to defend Edenia; he will take my place as Defender. Daegon, however, will be punished severely for the suffering he has caused."