Night-root grows under white moss in Sherwood Forest, and it takes the form of a nasty unappealing brown root, but the inside of it is crystalline and looks like a starry night sky, hence the name. When someone eats it, they are confronted with a physical representation of their worst fear. They must defeat and overcome this fear in order for the Night-root to work. There was some Night-root in Rumplestiltskin's possession, but it was taken by Zelena and used on David.
- S3, E14: "The Tower"