Ground Thassil Root
Ground Thassil Root is an odorless, flavorless blue powder that acts as a potent poison if ingested. It can render its victims immobile, unconscious, and may be lethal in large quantities. It can be made into a clear paste and used to coat slashing or piercing weapons, capable of felling all but the hardiest of victims. Ground Thassil Root has a natural quality to slow or reduce healing in its victims, ensuring that few of those so poisoned ever recover.
It was recently used in the poisoning of the priestess of Avandra, Lady Serida Bonhart, the head priestess in charge of Threecoins Chapel, in the village of Hawksbridge. It was presumably delivered into her food or drink while she dined in the common room of the Rest on the Run Inn. In this case, the poison was discovered and eventually neutralized by the alchemical skill of Eth Elleric, an elf druid.
The source of the poison was traced back to the city of Hawkstone, although the exact dealer was still unknown. The tiefling assassins who were active in Hawksbridge were known to have bought fairly large quantities of the poison.