Daegon first appears in Mortal Kombat: Armageddon. He is the younger brother of Taven, and son of Argus and Delia. When Delia had a vision of Armageddon, Argus had his sons put into incubation, guarded by the two dragons Orin and Caro. They would one day awaken and komplete their quest to defeat Blaze and save the realms from Armageddon.

Daegon awoke prematurely due to an error 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 then formed the Red Dragon Clan, 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 take a weapon that was given to them by their father (the Drakeswords) and a gift from their mother (their armor). When Daegon found the swords he took them both.

After enlisting the aid of Shinnok, Daegon is given false information by the fallen Elder God that his parents are aiding his brother Taven on his journey. Enraged, he supposedly kills Argus and Delia and sends his Red Dragon troops to get rid of Taven. Taven manages to survive the attacks, and he eventually meets up with Daegon at the Pyramid of Argus in Edenia. The two brothers do battle, with Taven emerging victorious, thus earning the right to challenge Blaze.

In Daegon's ending, it is revealed that he defeats Blaze by stabbing him in the back when Taven was fighting him. His parents are revealed to be alive feigning death as to draw out the true nature of their sons. Taven being the noble one will take Argus' place as Defender of Edenia while Daegon will be punished severely for the suffering he caused.

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