Emerald Claw Pathfinder
Shard of Darkness
A small black orb that seems to consume the light around it.
Any targets slain by a weapon with this crystal embedded in it cannot be brought back through use of revivify, raise dead, resurrection, or similar magic without first locating the deceased soul in Mabar and retrieving it. Only functions while inside in a mundane masterwork weapon. Has no effect on outsiders or similar beings lacking a soul/body duality.