The Fingerprint Grape is a Key Item introduced in Elden Ring. Eyeball of the knight Vyke, inflamed yellow. Seared with a repulsive fingerprint burn akin to those that marred his entire body.

The rings form a kind of fingerprint—actually, with its irregularly spaced lines, the pattern bears a remarkably close resemblance to a DNA fingerprint. (See Create a DNA Fingerprint.) ...

The Fingerprint Stone Shield can be found in the Cathedral of the Forsaken, which you'll unlock shortly after defeating Mohg, the Omen. If you need help on finding Mohg, please refer to its page.

The basis of the science lies in a tree's unique pattern of growth rings, which acts as a kind of fingerprint. Every year a new ring is added to a tree's trunk and branches, just beneath the bark.