5 Most Terrifying Mythical Monsters from around the World Infographic: https://grapact.com/5-terrifying-mythical-monsters-from-around-the-world/

https://en.wikipedia.org/wiki/Manananggal

The Story Of Slenderman, The Internet’s Own Monster

https://www.washingtonpost.com/news/the-intersect/wp/2014/06/03/the-complete-terrifying-history-of-slender-man-the-internet-meme-that-compelled-two-12-year-olds-to-stab-their-friend/

https://en.wikipedia.org/wiki/Slender_Man

https://en.wikipedia.org/wiki/Wendigo

https://www.thecanadianencyclopedia.ca/en/article/windigo

https://en.wikipedia.org/wiki/Rokurokubi

https://en.wikipedia.org/wiki/Chupacabra

http://www.bbc.com/earth/story/20161109-the-truth-about-a-strange-blood-sucking-monster