Thearn wiki Crystal City

According to Hayashi-sensei, with Zephriel's memories: "... a city, floating in the air, made of blue and silver crystal. With the loss of magic, though, it crashed to the ground, and it's in ruins now. We may have to dig, but some of the buildings were quite strong, and may be intact, including the treasure house. It depends on where it landed... I believe it was near a lake, so it may have hit mud, and be intact, if buried."

"The holy city of the Serafin. They stayed in the skies, to remain aloof from earthly concerns. "