Castle, a heavy metal band with a love of the occult, have recently released their third album since their formation in 2009. Titled Under Siege, the record was produced with Billy Anderson, who also worked with Eyehategod and Neurosis. The group’s first release, In Witch Order, which was on the German label Van Records, was met with great success overseas. The band will be performing on May 31 at The Acheron in Brooklyn.