Vervain is a herb found in Europe and Northern America containing supernatural properties.

Vervain is poisonous to Vampires and burns their skin on contact, leaving painful red burn marks or even blisters. If ingested, it will cause Vampires to burn over their entire bodies and will leave them severely weakened. Only once it fully leaves their system or if a Vampire consumes enough blood will the burns heal.

When human ingest Vervain, it will make them immune to compulsion as long as it is in their systems.