A kumiho is a creature that appears in folktales and legends of Korea which is similar to the Chinese Huli Jing and the Japanese Kitsune. It is a nine-tailed fox that can assume the appearance of a young and beautiful woman who is set out to seduce boys and eat their liver or heart. There are numerous tales in which the kumiho appears, several of which can be found in the encyclopedic Compendium of Korean Oral Literature. In Korean Mythology, unlike in China and Japan, kumiho is considered amoral which means that it is almost always evil and can also use the magical yeowoo guseul marble in their mouths to absorb people’s vital energy via a “deep kiss” of sorts. However, if someone is able to take and swallow the Kumiho’s yeowoo guseul marble during that kiss, the person not only won’t die but will get incredible knowledge of the “sky, land, and people.”
Source: ---. “Kumiho : The 9 Tailed Fox.” Mythlok, 22 Jan. 2024, https://mythlok.com/kumiho