Warning: The following text contains spoilers relating to the plot of the Prophecies Campaign.
The Flameseeker is the main focus of the Flameseeker Prophecies foretold by the dragon prophet Glint 800 years before present game time. What the prophecies fully tell of this being is unknown, but what is known is that he will seek control of the Titans and bring about the destruction of the Mursaat. At the end of the Prophecies campaign, the Flameseeker's identity is exposed.