Fennith (mushroom)

Fennith was a water mushroom that lived in the Shimmerer, one of the Four Lakes. They were harvested and traded by the Tusked Webfoots. On top of being delicious, they have the property to produce fresh air when in contact with water, helping for example fourthlings to dive, as did Cade in Doombringer. A webfoot goblin in Weird New Worlds was named for this fungus.