Poison for the Fairies
Veneno para las hadas (original)
In 1965 Mexico City, Fabiola, a wealthy yet lonely schoolgirl, befriends Graciela, a young orphan girl who has an unhealthy fascination with witchcraft. Fabiola is convinced that she, herself, is a witch by Graciela, who then uses the fear that she's put into her new friend to get Fabiola to carry out her orders. As their games grow more serious, the two girls find themselves involved in murder.
Starring Ana Patricia Rojo, Elsa Maria Gutierrez, Leonor Llausás, Carmela Stein, Maria Santander, Ernesto Schwartz, Lilia Aragón, Hilda Perez Carbajal, Marcela Paez, Araceli de Leon
It's a fantasy and horror movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Singapore.