Oddly glowing stone. It gives off exactly the same wavelength as the one in the graveyard.
How to GetEdit
Go back to Bistritz after the float rises and enter the item shop(Nina's house). Take care of the plants outside, leave Bistritz, re-enter, and repeat. Eventually, You'll see Nina outside. Talk to her.
Allows Yuri to gain his third-level Earth class fusion, provided that all other conditions are met.