Messages from an Ancient Era

"" is a TotK: in.

Overview
After completing the second stage of the "TotK:" by awakening one of the TotK:, a TotK: falls to the ground and lands in the pond in the southwest of TotK:, drawing the attention of its residents. TotK:, the TotK:'s expert on the TotK: language, inspects it and finds that a TotK: on it contains text dating back to the TotK:.