The great demon Saslouka.
Duncan felt a sense of familiarity vaguely surfacing in his heart, and he quickly remembered that he had indeed heard the term before—in a casual conversation with Morris a long time ago.
"I remember... this is the name of the 'chief god' described in the ancient belief system unique to Elves," he began slowly, as he thought aloud, "This demon god possesses the power to control the Dreamscape and soul wandering. In your legends, this great demon is even related to the onset of the current 'Sea Era'—"
"Yes, Captain Duncan," Taran El nodded, "According to those ancient legends, the world was originally a Dreamscape, created by the great demon Saslouka in a state between sleeping and waking. Elves were born as residents within that Dreamscape, and our inherent mission was to serve Saslouka in the dream, to prolong his slumber as much as possible, to prevent the entire world from meeting its end due to the demon god's awakening."