A Volcra is one of the many creatures living in the Shadow Fold that feasts on human flesh.
A volcra has long, dirty claws, leathery wings, and rows of razor-sharp teeth. They are blind from living in the Fold for so long, but books say they can smell human blood from miles away.
Baghra reveals to Alina Starkov that the volcra were a mistake. The volcra used to be human long ago, but the Fold changed them into monsters. Baghra calls them "his punishment, a living testimony to his arrogance."