Ubume (Japanese) – Ghosts of women who died in childbirth Uchek Langmeidong (Meitei mythology) – Semi human, semi hornbill creature Ukko (Finnish) – Finnish sky deity Uma-no-ashi (Japanese) – Horse's leg which dangles from a tree and kicks passersby Umibōzu (Japanese) – Ghost of drowned priest Umi-nyōbō (Japanese) – Female sea monster who steals fish Unclean force – Slavic mythological force Undead (Worldwide) – Dead that behave as if alive Underwater panther (Native American) – Feline water spirit Undine (Alchemy) – Water elemental Ungaikyō (Japanese) – Animated mirror Unhcegila (Lakota) – Dragon Unicorn (Medieval Bestiaries) – Horse-like creature with the legs of an antelope, the tail of a lion and a single magical healing horn. Unktehi (Lakota) – Serpentine rain spirit Unktehila (Lakota) – Reptilian water monster Upinis (Lithuanian) – River spirit Upiór Ur (Mandaean) – King of the World of Darkness, often portrayed as a dragon or snake Urayuli (Native American) – Hairy giant Uriaș (Romanian) – Giant Urmahlullu (Mesopotamian) – Lion-human hybrid guardian spirit Ushi-oni (Japanese) – Bull-headed monster Utukku (Akkadian) – ″Underworld messenger spirit″ Uwan (Japanese) – Spirit that shouts to surprise people