Origin of the Puruus location (Leyar Terrace)

Clue

"Puruus are unique Elementals found only in Leyar Terrace. No one knows how the Elementals came to Luterra, and why they are not found anywhere else. If only I could find the slightest clue..." A Luterran researcher of Elementals is now agonizing over the origin of Puruus. Find a way to help the poor scholar in the Land of Puruus.

Story

"That explains it! Puruus were Earth Elementals in the past! Their body and magick energy must have gone through a drastic change while adapting to Luterra's environment! This is a great discovery indeed! I can't just sit around like this. I'll meet that Elemental named Ligheas myself!" Excited, the researcher started running as fast as his legs could carry him toward Leyar Terrace before anyone could stop him. Shortly after, the silence around Leyar Terrace was broken by the painful screams of the frozen researcher.