Top 5 Horror Anime Openings

Note: These are the ONLY horror anime I know. Can anyone give me some suggestions? UPDATE: 2/22/15. So far, I have watched Kuroshitsuji, Another, Attack on Titan and Deadman Wonderland. I’m currently watching Dangan Ronpa and Tokyo Ghoul Season 2. Keep sending suggestions! ^_^ I do not own. All rights for Mirai Nikki go to Kadokawa, Asread, and Funimation. Elfen Lied and Highschool of the Dead belong to The Anime Network.