Carrion Crown Greyhawk
While within range of a haunt, twist the metal casing to open the vial in the same round that the haunt manifests. This will deal damage to the haunt, and potentially neutralise it altogether. If neutralised, some of the haunt’s energy is captured by the Haunt Siphon, allowing it to be used as a grenade-like weapon that deals negative energy damage.
These glass vials are held within stylised cold-iron casings etched with strange runes, necromantic designs or other eldritch markings. Within the vial roils a small wisp of white vapour, churning as if caught in a miniature vortex of air.