Neither of Vivianne’s two families had shown any interest in embracing her upon her return, and so her wedding guests would be exclusively vampires. A little poison in the food would create the right amount of chaos...and Klaus would have to dole out his own blood to heal the vampires stricken by the venom. Only a hybrid’s blood could stop the wolf poison from killing a vampire—but it’s not like the prank would even go that far.

- The Originals: The Loss, Chapter 8