White Spirit Emblems harbor the souls of the dead. Only a shinobi could find use for such a thing.
Required for using Prosthetic Tools. It's essentially a universal ammunition type, awarded for defeating enemies Sekiro removes from the world and consumed by the prosthetic whenever it's used.
Spirit emblems are awarded for defeating enemies and can be found throughout the world, where they will float towards the Wolf upon getting close enough to them. They are first seen after acquiring the first shinobi prosthetic.