Most plants thrive in open and sunlight. A rare few make their domain in shadow. The Flailing Vine is of that latter sort; a semi-sentient plant that takes root in dark corners and feeds on flesh to grown and sustain itself. While most of its meals are vermin and other creatures that dwell in the dark, a fully grown Flailing Vine is more than capable of killing and devouring larger creatures.
Once every few months, the Flailing Vine releases spores that fill the air around it and coat its surroundings. If a living creature comes into contact with these seed spores, there’s a chance they’ll germinate and grow into a new plant beneath their skin. When it’s large enough, it emerges from the unwitting carrier’s body to find a more permanent home. It’s a less than pleasant experience.