Which X-plots would make the best horror movies?

[Washout]

In honor of Halloween coming up, let's have some fun with our favorite X-men stories. Barring the obvious (Necrosha, Legacy Virus, that vampire arc that everyone complained about) which mutant tales do you think would make for the best scary movies?

Feel free to bend the plot a little bit or simply use the general plot idea.

Here are some ideas I had.

http://i88.photobucket.com/albums/k182/havok73/darkphoenix.jpg

Plot: A group of kids and their teacher freak out when the most beautiful, innocent girl among them starts killing people and even threatens to destroy the world.

http://i88.photobucket.com/albums/k182/havok73/decimation.jpg

Plot: An evil witch uses her powers to remove specific genetic make-up from an entire people group leaving them open to an attack by a group of serial killing fanatics.

http://i88.photobucket.com/albums/k182/havok73/Hellions.jpg

Plot: The snobby headmistress of an elite boarding school lives in fear as a man from her past starts to kill off her students one by one.

http://i88.photobucket.com/albums/k182/havok73/planetx.jpg

Plot: The new teacher in school is very popular. . . enough to convince an entire class of troubled children to start killing, starting with the teaching staff.

[Cayman]

Nanny and Orphan Maker.

[fortyseven]

END OF GREYS.

for sure.

[Norj]

Demon Bear Saga, Inferno, Morlock Massacre.

[Washout]

END OF GREYS.

for sure.

Oh definitely. A group of aliens comming to earth to tear a whole family apart because of something their dead daughter did would be terrifying.