Oddly glowing stone. It gives off exactly the same wavelength as the one in the graveyard.
How to GetEdit
After retrieving Yuri and defeating the mayor; leave Bistritz and then go back in. 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.