It (1990)
In 1960, a group of social outcasts who are bullied by a gang of greasers led by Henry Bowers are also tormented by an evil demon who can shape-shift into a clown and feed on children's fears and kill them. After defeating the demonic
Halloween III: Season of the Witch (1982)
An apparent murder-suicide in a hospital emergency room leads to an investigation by the on-call doctor, which reveals a plot by an insane toymaker to kill as many people as possible during Halloween through an ancient Celtic ritual