Hyacinth (storyline)/Summary 4-9-23 (summary)
Kiyonna arranged for use of the Mist Harbor Library's Meeting Hall, and used the forum to share the secret that the Iyo have been keeping for generations:
Beneath the Isle of the Four Winds lies a Great Elemental, though it's uncertain if it is lava or fire at its core. The Iyo have hidden the Isle from it through the use of a Great Seal, which they guard with their lives. It is believed that if Hexah'Jing's focus were to turn to the surface, it would scorch the world in its entirety.
Kiyonna returned three pieces to the Library that she had taken some years back, explaining that the secrecy which had been paramount no longer existed, since the knowledge of Hexah'Jing had been shared. {These documents have been uploaded to the wiki as official lore}.
Kiyonna also spoke somewhat on the Iyo's feelings about death and spirits, and played a mandolin which was imbued with ethereal flames. She explained that the Iyo believe that those flames are the manifestation of kindly spirits that have passed on, but still remain close by in small ways.