Also known as Polygonum multiflorum, a rare medicinal herb with heart-shaped leaves and twining vines. The specimen Lin Wan found was at least sixty years old, with a purple-black root the size of a baby's fist covered in strange natural patterns. It has a rich medicinal fragrance that refreshes body and mind. A wild herb of this age is practically priceless and worth a fortune. It grows on a dangerous cliff face with concentrated spiritual energy at its roots.