Hyperion

In Greek mythology, Hyperion (/haɪˈpɪəriən/; Greek: Ὑπερίων, 'he who goes before') was one of the twelve Titan children of Gaia (the Earth) and Ouranos (the Sky). With his sister, the Titaness Theia, Hyperion fathered Helios (the Sun), Selene (the Moon) and Eos (the Dawn).
Hyperion was, along with his son Helios, a personification of the sun, with the two sometimes identified. John Keats's abandoned epic poem Hyperion is among the literary works that feature the figure.
Hyperion is one of the twelve or thirteen Titans, the children of Gaia and Ouranos. In the Theogony, Ouranos imprisoned all the children that Gaia bore him, before he was overthrown. According to pseudo-Apollodorus, Ouranos only imprisoned the Hecatoncheires and the Cyclopes but not the Titans, until Gaia persuaded her six Titan sons to overthrow their father Ouranos and "they, all but Ocean, attacked him" as Kronos castrated him. Afterwards, in the words of Hesiod, Hyperion subjected his sister Theia to his love, and fathered on her three children, the lights of heaven; Helios (Sun), Selene (Moon) and Eos (Dawn). As is the case for most of the Titans, there are no myths or functions for Hyperion. He seems to exist only to provide a father for the three celestial deities. As a Titan, one of the oldest generation of gods, Hyperion was a fitting father for these three sky-gods who, as elements of the natural world, must have been conceived of as having come into being near the beginning of the cosmos.
However, in world Hyperion has appeared as an evil force, attempting to return to the world and escape Tartarus. He had the cult known as The Twelve affect the politics in Heliotym in order to bring about his rise. Heliotym is also where in the Titanomachy Hyperion was felled, scattering their ichor throughout the country, appearing like veins of gold. Later on these veins where believed to be the blessed ichor of Apollo. Later this ichor was infused into people, often by the Faen and people trying to imbue their children with magical abilities. One of the famous examples of this was Soúro Marathas turning them into an immensely powerful seer and warrior. However this also made them the perfect vessel for Hyperion. All that was needed for their release was a huge mortal sacrifice, which The Twelve where able to supply by manipulating The Faen and the Order of the Vallotis into warring with eachother.
When he did arise he caused massive destruction in the city of Dexicos and managed to kill many of the party, despite Souro trying to resist his inhabitation of his body. However, he failed to continue in this form as the party defeated him,with Leoven delivering the final blow sending the titan back to Tartarus and killing her brother in the process.