

Life Reverberating Stones have the strength to pull out the true purposes hidden within certain Artifacts, as seen with the curse-warding box and the elevator leading into the 6 th layer. Futhermore, Faputa was also able to communicate with Prushka to an extent.

Prushka was also seemingly still able to communicate with Riko in subtle signals, as seen during the Fuzosheppu crisis. Some form of consciousness of the sacrificed person remains within the Life Reverberating Stone as seen when Riko, Nanachi, and Reg found Riko's stolen White Whistle being altered by a Narehate, but Riko stopped Reg from taking it back, sensing that Prushka "did not hate it". Hence, the White Whistle can only be used by them. Each Life Reverberating Stone possesses a life pattern unique to the person sacrificed for the stone the pattern is only compatible with the individual the Life Reverberating Stone is intended for. If the person has a firm resolve to sacrifice everything for the whistle's intended user, they can potentially turn into a Life Reverberating Stone. The raw material required to create a Life Reverberating Stone is a human being. It is revealed by Bondrewd that White Whistles are made out of Second Grade Artifacts, called Life Reverberating Stones. Spoiler warning: The following section contains spoilers.
