The legend goes that once the sun beast, Heltere, came down from the skies, Regan Sol, the leader of Solidad, stepped forth to take him down. Heltere boasted that he could not be destroyed for his mother, the Sun, would restore him, healing any wound he received almost instantly. Regan Sol, being as stubborn as he, covered her body in a protective spell and took him on. The fight raged on, with Regan Sol eventually scoring a blow that knocked the beast out.
From here the legend varies. Some say they were both destroyed. Another tale goes that Regan Sol did die, but a shard lodged itself in her arm, giving her regenerative power and immortality. Another track of this legend states that Heltere was sealed underground and his occasional shifting in his sleep is the cause of earthquakes.