Heroes of the Nentir Vale
The Bloodreavers are a group of Hobgoblin slavers. They have set up a lair in the Chamber of Eyes deep within the Thunderspire Mountain. They steer clear of the Seven-Pillard Hall for the most part. They are led by Chief Krand. After his death at the hands of Uriel in one-on-one combat, the Warcaster took over control, though that only lasted a day before the party killed what was left of the Bloodreavers in the Chamber of Eyes.