The Raven (2007)

Roderick throws a masquerade ball inside a creepy mansion with a dark past. An infamous mass-murder happened there fifty years ago to the night, but that's part of the fun for the posh hotties who show up for some boozy partying. The reverie is cut short when a Raven-masked killer crashes the party, intent on repeating the bloody history of the "Ravenwood Massacre" that happened decades ago. As the unknown killer picks the guests off one by one, old grudges resurface among friends, and new suspicions emerge.