A tarry vine attacking Tem Barkwater.

Tarry vines were plants universally feared by the inhabitants of the Deepwoods. These sinister vines formed symbiotic relationships with the giant, flesh-eating bloodoak trees, which they helped to ensnare prey. They then fed on the victim's blood while their host gorged on the flesh. If a vine was ever severed, three new vines grew in its place. This could be prevented by cauterizing the stump with a flame.