After 80+ attempts (for me) Sindragosa finally went down. Lem's team also took her down a couple of days after.

The Blood Princes are the last 25 man boss we've killed. Left still are Putricide, Blood Queen, Dreamwalker, Sindragosa, and Arthas.

After struggling on the "twins" for so long in the 10 man version, we killed Festergut and Rotface back to back with minimal (if any) wipes.

Twilight fans rejoice! A Vampire fight!