Henbane - is a Solanaceae plant, a species of Hyoscyamus, a Eurasian plant of the genus Henbane. It has sticky leaves and funnel-shaped yellow-green flowers with purple veins. The flowers have an unpleasant pungent odor and contain the highly toxic hyoscyamine. Consuming the extracted juice can cause speech and visual impairments and even death.
Unfortunately, although the flowers are poisonous, if you want to kill someone, you must break off the flowers and extract the poisonous juice. In other words, the hen fairy must sacrifice herself first before she can poison others...