Cait-Sith is a mythological creature from Scotland and Ireland. These fairies appear black cats with a white patch of fur on the chest. In some stories, they walked erect on their hind legs and are widely perceived as malicious creatures. Cait-Sith is much bigger than regular cats, typically the size of a big dog, & their backs are covered in sharp bristles which point upwards.

I discovered claims that the Cait-Sith could steal a person’s soul by walking over a dead body before it had been properly buried. In the Gaelic Samhain festival, however, the Cait-Shth would magically bless the house’s residents if you left a milk bowl outside your door. I am yet to find a source to back up such two claims.

According to some stories, the Cat-Sth is not a faery at all, nor is it related to a faery folk. According to this interpretation, a Cat-Sth is a witch able to transform into a black cat. On this point, I find it challenging to differentiate original mythologies from modern retellings. Still, some versions assert that such a witch can cast this transformation spell nine times in her lifetime, and she will never be able to retake the shape of a human after she evolves into a cat for the ninth and final time.