This unnamed vampire nest consisted of four members and was based in Purgatory.
At some unknown point in time, this vampire nest formed and ended up consisting of four people. The members were vampires who died and went to purgatory. The vampires were able to sense Castiel due to him being an angel. Dean Winchester and Benny Lafitte protected Castiel and fought the vampires. Dean fought one and killed it by decapitating it with his Purgatory Blade. Two more appeared and came at Benny and Dean. Benny and Dean saw them and killed both of the vampires. The last one attacked Castiel but Castiel easily overpowered it and killed it by smiting it.