Broken Throne 2
The Black Rose is a chivalric order of Knights, who are sworn to House Olvir, and Throncrest.
They have very talented undead magicians, necromancers. The Knights themselves are a unique type of undead that can be ressurected multiple times with proper rituals and support. They are working to unseal the Old God and push the world into eternal darkness, where they will reign as the new Kings of Undeath.
They are preparing to Siege the Broken Throne.