Camp Clear Vista is not only a summer camp but the home to the curse involving a woodcarver and a mask he carved from a tree hosted by an evil spirit.

Source: https://www.cbr.com/you-might-be-the-killer-sympathetic-slasher-villain-sam/

Four family members smothered pregnant wife to death because they thought she was 'possessed by an evil spirit'

Source: https://www.dailymail.co.uk/news/article-12531123/Husband-25-helped-family-murder-pregnant-wife-believing-possessed-evil-spirit-denied-parole.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

“The maulana then alleged that there is an evil spirit around him (complainant) that wants to spoil his career.

Source: https://indianexpress.com/article/cities/mumbai/mumbai-gym-trainer-duped-maulana-conducting-rituals-8540892/

This evil spirit known as Sanzia takes refuge inside a porcelain doll, which naturally finds its way to the hands of a young child.

Source: https://gamerant.com/best-scariest-dolls-horror-movies/