The Rise of the Forgotten
The Rattling Wood
A forest a day's journey outside of Selheim, it is so named for the distinctive trees that grow there. These "Rattlers" grow bark-like leaves shaped like cesta that, when disturbed by the wind, collide with one another to produce the eponymous "rattling" for which the wood is named.
The Rattling Wood was the site of several disappearances linked to deep-forest animals (namely giant cave spiders) being forced outside of their habitats by encroaching creatures from the Underdark.