Son of the Mountain

The , also known as the Deian's Chosen One, was the central figure in over a thousand ancient Deia prophecies that foretold the coming of a being that would triumph over darkness time and time again and restore the light as the dominant force in the equilibrium. Many Deia, such as Ichigo Utagawa, believed the prophecy predicted the end of the Order of the Tenebrae, Agathon cautioned that the prophecy is not fully understood and may have been misinterpreted.

In the time of the Synth Wars, many believed the Son of the Mountain to be born in the form of Dominic Everest, however, it was too late before it was realized that he was the fulfillment of the "Mistaken One" prophecy- the precursor to the Son of the Mountain that would bring forth the conditions needed for the Son of the Mountain to be born. The Chosen One would be born not as Dominic but as his firstborn child, Joseph Everest VI, who would fulfill every single prophecy ever written about the Son of the Mountain.

However, Joseph would later learn a disconcerting truth about the Son of the Mountain: The Chosen One is not a singular reference but rather a plural term, referring to several individuals over time. Twilight states that every so often, one would arise from the Everest Clan, the progenitors of Light and Darkness, to reset the scales of the equilibrium, with the benefiting sides switching with the emergence of the Chosen One. It is also revealed that the Mistaken One is actually the name of the 's who reset the scale in favor of the Darkness and that the Chosen One's reset the scale in favor of the Light. Though it was believed that the Tenebrae would be defeated, the Tenebrae would eventually reemerge, with the Seventh One resetting the scales in their favor and that it would continue until the equilibrium inevitably fell apart. This is proved to be entirely false, as after Joseph defeated the Tenebrae, the next and final iteration, the One Tenebrae, had laws and codes that implemented respect towards the Light, not defamation, which would make them a Twilight organization, not a Darkness cult.

List of prophecies mentioned in

 * Darkness Beckons The End!
 * Master of Knowledge
 * The Mountain Rises
 * Sons and Daughters of the Mountain